Update expected messages, errors and warnings for "kernels" tests

Update expected messages, errors and warnings for "kernels" tests

	gcc/testsuite/
	* c-c++-common/goacc/classify-kernels-unparallelized.c: Update expected
	message/warning/error output.
	* c-c++-common/goacc/classify-kernels.c: Likewise.
	* c-c++-common/goacc/kernels-decompose.c: Likewise.
	* c-c++-common/goacc/note-parallelism-1-kernels-loop-auto.c: Likewise.
	* c-c++-common/goacc/note-parallelism-combined-kernels-loop-auto.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-kernels-loop-auto.c: Likewise.
	* c-c++-common/goacc/routine-1.c: Likewise.
	* c-c++-common/goacc/routine-4-extern.c: Likewise.