Autoconf: Print the GNU C Library version when needed in autogen.sh

[tcpdump] / tests / lisp_invalid.out

    1  2015-08-22 11:09:05.156268 IP 192.168.0.105.4342 > 127.0.0.1.4342: LISP-Map-Notify, 3 record(s),
 [unsupported address family identifier 7680]
    2  2015-08-22 11:09:05.615558 IP 192.168.0.105.4342 > 127.0.0.1.4342: LISP-Map-Notify, 2 record(s), [authentication data length 35117 > 112] (invalid)