Update expected messages in OpenACC tests

Update expected messages in OpenACC tests

This updates the types of messages expected in the test, and the '-fopt-info'
option used to request them.  The phrasing of the expected messages has also
changed somewhat and has been adjusted to match.

2021-04-07  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/testsuite/
	* c-c++-common/goacc/note-parallelism-1-kernels-conditional-loop-independent_seq.c:
	Update additional options and expected messages.
	* c-c++-common/goacc/note-parallelism-1-kernels-loop-auto.c: Likewise.
	* c-c++-common/goacc/note-parallelism-1-kernels-loop-independent_seq.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-1-kernels-loops.c: Likewise.
	* c-c++-common/goacc/note-parallelism-1-kernels-straight-line.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-combined-kernels-loop-auto.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-combined-kernels-loop-independent_seq.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-kernels-conditional-loop-independent_seq.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-kernels-loop-auto.c: Likewise.
	* c-c++-common/goacc/note-parallelism-kernels-loop-independent_seq.c:
	Likewise.
	* c-c++-common/goacc/note-parallelism-kernels-loops.c: Likewise.