Mend "make check" on Solaris 9 (Autoconf only).

Mend "make check" on Solaris 9 (Autoconf only).

Sun C 5.9 does not support C99. GCC 4.6.4 recognizes -std=gnu99, but
does not support the z length modifier in printf(3). In either case 18
tests fail in the following manner:

<     [...]: domain [length 0 < 12] (invalid)
---
>     [...]: domain [length 0 < zu] (invalid)

Make these tests conditional and disable them when HAVE_NO_PRINTF_Z is
defined. Modify the Autoconf leg of the build process to define the
macro when printf() does not handle %zu as expected. The CMake leg looks
broken on Solaris 9 with 2.8.9 now, so leave it be for now.