OpenMP: Fix ICE in metadirective recovery after error [PR120180]

OpenMP: Fix ICE in metadirective recovery after error [PR120180]

It's not clear whether a metadirective in a loop nest is supposed to
be valid, but GCC certainly shouldn't be ICE'ing after diagnosing it
as an error.

gcc/c/ChangeLog
	PR c/120180
	* c-parser.cc (c_parser_omp_metadirective): Only consume the
	token if it is the expected close paren.

gcc/cp/ChangeLog
	PR c/120180
	* parser.cc (cp_parser_omp_metadirective): Only consume the
	token if it is the expected close paren.

gcc/testsuite/ChangeLog
	PR c/120180
	* c-c++-common/gomp/pr120180.c: New.