OpenACC default clause maintenance

OpenACC default clause maintenance

	gcc/cp/
	* parser.c (cp_parser_omp_clause_default): Avoid printing more
	than one syntax error message.
	gcc/testsuite/
	* c-c++-common/goacc/default-1.c: New file.
	* c-c++-common/goacc/default-2.c: Likewise.
	* c-c++-common/goacc/data-default-1.c: Remove file, including its
	test cases in...
	* c-c++-common/goacc/default-3.c: ... this new file, and...
	* c-c++-common/goacc/default-4.c: ... this new file.
	* gfortran.dg/goacc/default.f95: Remove file, including its test
	cases in...
	* gfortran.dg/goacc/default-1.f95: ... this new file, and...
	* gfortran.dg/goacc/default-2.f: ... this new file.
	* gfortran.dg/goacc/default-3.f95: New file.
	* gfortran.dg/goacc/default-4.f: Likewise.

From-SVN: r248278