gcc/

	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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229129 138bc75d-0d04-0410-961f-82ee72b054a4