Fix Openni2 build failed on linux (update to C99 standard)

[Daichou]

original bug

• original source code is use g++ 7.3.0 will build failed. Because in c99 FUNCTION marco should not use string concatenate.
• VA_ARGS Variadic marco may be empty. So it need to add "##" to fix.

[ 14%] Building CXX object CMakeFiles/rs2driver.dir/src/Rs2Stream.cpp.o
In file included from /home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.h:3:0,
                 from /home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Device.h:3,
                 from /home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Driver.h:3,
                 from /home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:1:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp: In member function ‘OniStatus oni::driver::Rs2Stream::initialize(oni::driver::Rs2Device*, rs2_sensor*, int, int, std::vector<oni::driver::Rs2StreamProfileInfo>*)’:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:50: error: expected ‘)’ before ‘__FUNCTION__’
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                  ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:31:2: note: in expansion of macro ‘rsTraceFunc’
  rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, sensorId, streamId);
  ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:91: warning: too many arguments for format [-Wformat-extra-args]
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                                                           ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:31:2: note: in expansion of macro ‘rsTraceFunc’
  rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, sensorId, streamId);
  ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp: In member function ‘void oni::driver::Rs2Stream::shutdown()’:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:50: error: expected ‘)’ before ‘__FUNCTION__’
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                  ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:55:18: note: in expansion of macro ‘rsTraceFunc’
  if (m_sensor) { rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId); }
                  ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:91: warning: too many arguments for format [-Wformat-extra-args]
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                                                           ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:55:18: note: in expansion of macro ‘rsTraceFunc’
  if (m_sensor) { rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId); }
                  ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp: In member function ‘virtual OniStatus oni::driver::Rs2Stream::start()’:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:50: error: expected ‘)’ before ‘__FUNCTION__’
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                  ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:74:3: note: in expansion of macro ‘rsTraceFunc’
   rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId);
   ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:91: warning: too many arguments for format [-Wformat-extra-args]
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                                                           ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:74:3: note: in expansion of macro ‘rsTraceFunc’
   rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId);
   ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp: In member function ‘virtual void oni::driver::Rs2Stream::stop()’:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:50: error: expected ‘)’ before ‘__FUNCTION__’
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                  ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:86:3: note: in expansion of macro ‘rsTraceFunc’
   rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId);
   ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:40:91: warning: too many arguments for format [-Wformat-extra-args]
 #define rsTraceFunc(format, ...) printf("[RS2] " __FUNCTION__ " " format "\n", __VA_ARGS__)
                                                                                           ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:86:3: note: in expansion of macro ‘rsTraceFunc’
   rsTraceFunc("type=%d sensorId=%d streamId=%d", (int)m_rsType, m_sensorId, m_streamId);
   ^~~~~~~~~~~
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp: In member function ‘virtual OniStatus oni::driver::Rs2Stream::convertDepthToColorCoordinates(oni::driver::StreamBase*, int, int, OniDepthPixel, int*, int*)’:
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Base.h:39:145: error: expected primary-expression before ‘)’ token
 raceError(format, ...) printf("[RS2] ERROR at FILE %s LINE %d FUNC %s\n\t" format "\n", __FILE__, __LINE__, __FUNCTION__, __VA_ARGS__)
                                                                                                                                      ^
/home/tommycc/work/librealsense/wrappers/openni2/src/Rs2Stream.cpp:114:3: note: in expansion of macro ‘rsTraceError’
   rsTraceError("Invalid colorStream");
   ^~~~~~~~~~~~
CMakeFiles/rs2driver.dir/build.make:86: recipe for target 'CMakeFiles/rs2driver.dir/src/Rs2Stream.cpp.o' failed
make[2]: *** [CMakeFiles/rs2driver.dir/src/Rs2Stream.cpp.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/rs2driver.dir/all' failed
make[1]: *** [CMakeFiles/rs2driver.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

update

For FUNCTION marco, it must not use string concatenate I follow GNU GCC Function Names as Strings use %s format to fix.
For VA_ARGS variadic macro, I follow GNU GCC Variadic Macros to fix it.

[dorodnic]

Thank you @Daichou
@timofey-aleynikov could you please take a look?