gcc/fortran/
	* openmp.c (gfc_match_omp_clauses): Show a clause-parsing
	error if none was rised before.
	* parse.c (matcha, matcho): If error occurred after
	OpenMP/OpenACC directive matched, do not try other directives.

	gcc/testsuite/
	* gfortran.dg/goacc/asyncwait-1.f95: Handle new error message.
	* gfortran.dg/goacc/asyncwait-2.f95: Likewise
	* gfortran.dg/goacc/asyncwait-3.f95: Likewise
	* gfortran.dg/goacc/asyncwait-4.f95: Likewise
	* gfortran.dg/goacc/default-2.f: Likewise
	* gfortran.dg/goacc/enter-exit-data.f95: Likewise
	* gfortran.dg/goacc/if.f95: Likewise
	* gfortran.dg/goacc/list.f95: Likewise
	* gfortran.dg/goacc/literal.f95: Likewise
	* gfortran.dg/goacc/loop-2-kernels-tile.f: Likewise95
	* gfortran.dg/goacc/loop-2-parallel-tile.f95: Likewise
	* gfortran.dg/goacc/loop-7.f95: Likewise
	* gfortran.dg/goacc/parallel-kernels-cla: Likewiseuses.f95
	* gfortran.dg/goacc/routine-6.f90: Likewise
	* gfortran.dg/goacc/several-directives.f95: Likewise
	* gfortran.dg/goacc/sie.f95: Likewise
	* gfortran.dg/goacc/tile-1.f90: Likewise
	* gfortran.dg/goacc/update-if_present-2.: Likewisef90
	* gfortran.dg/gomp/declare-simd-1.f90: Likewise
	* gfortran.dg/gomp/pr29759.f90: Likewise

From-SVN: r276447