Fix documentation of -fprofile-exclude-files

Fix documentation of -fprofile-exclude-files

The wording of the description of -fprofile-exclude-files is easy to
misunderstand.  One can be led to believe a file is excluded only if
it matches all of the patterns, not just one.  This patch tries to
clarify the function.  It also adjusts the wording of
-fprofile-filter-files accordingly.

gcc/

	PR gcov-profile/96285
	* common.opt, doc/invoke.texi: Clarify wording of
	-fprofile-exclude-files and adjust -fprofile-filter-files to
	match.