PR gcov-profile/51113
	* coverage.c (build_var): Keep coverage variables static.

	testsuite/
	* lib/gcov.exp (verify-lines): Add support for xfailing.
	(run-gcov): Likewise.
	* gcc.misc-tests/gcov-13.c: Xfail weak function.
	* gcc.misc-tests/gcov-16.c: Remove.
	* gcc.misc-tests/gcov-17.c: Remove.
	* g++.dg/gcov-8.C: Remove.
	* g++.dg/gcov-9.C: Remove.
	* g++.dg/gcovpart-12b.C: New.
	* g++.dg/gcov-12.C: New.

From-SVN: r181892