<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19664> "libstdc++ headers should
have pop/push of the visibility around the declarations" (aka gcc#22482,
rhbz#162935) is fixed ever since GCC 4.2.

Make this a fatal configure error for now.  The check should be removed
completely after LO 5.3 branch-off.

Change-Id: I3e8fde187b4b20652ee3164485ef868a9bf5a7ce
Reviewed-on: https://gerrit.libreoffice.org/29071Tested-by: Stephan Bergmann <sbergman@redhat.com>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>