omp-low.c (check_omp_nesting_restrictions): Check OpenACC loop nesting.

omp-low.c (check_omp_nesting_restrictions): Check OpenACC loop nesting.

	gcc/
	* omp-low.c (check_omp_nesting_restrictions): Check OpenACC loop
	nesting.

	testsuite/
	* c-c++-common/goacc/clauses-fail.c: Adjust errors.
	* c-c++-common/goacc/sb-1.c: Adjust errors.
	* c-c++-common/goacc/sb-3.c: Adjust errors.
	* c-c++-common/goacc/loop-1.c: Adjust errors.
	* c-c++-common/goacc/nesting-1.c: Adjust errors.
	* c-c++-common/goacc-gomp/nesting-fail-1.c: Adjust errors.
	* c-c++-common/goacc-gomp/nesting-1.c: Adjust errors.

From-SVN: r229129