Fix expected messages in goacc tests

Fix expected messages in goacc tests

The expected messages in the OpenACC kernel-related tests should be prefixed
with 'optimized:' rather than 'note:'.

2019-05-31  Kwok Cheung Yeung  <kcy@codesourcery.com>

	gcc/testsuite/
	* c-c++-common/goacc/kernels-decompose-1.c: Change 'note:' to
	'optimized:'.  Fix typo.
	* c-c++-common/goacc/note-parallelism-1-kernels-conditional-loop-independent_seq.c:
	Change 'note:' to 'optimized:'.
	* 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.

(cherry picked from openacc-gcc-9-branch commit
09d9f4e78c1f68227fccd75d7d5b8b4a952c2b97)