PR gcov-profile/51113
	* coverage.c (build_var): Propagate visibility for public decls.

	testsuite/
	* gcc.misc-tests/gcov-13.c: Check gcovpart-13b coverage
	* gcc.misc-tests/gcov-16.c: New.
	* gcc.misc-tests/gcov-17.c: New.
	* g++.dg/gcov/gcov-8.C: New.
	* g++.dg/gcov/gcov-9.C: New.
	* g++.dg/gcov/gcov-10.C: New.

From-SVN: r181524