critical-hint-*.{c,f90}: Move from gcc/testsuite to libgomp/testsuite

critical-hint-*.{c,f90}: Move from gcc/testsuite to libgomp/testsuite

libgomp/ChangeLog:

	* testsuite/libgomp.c-c++-common/critical-hint-1.c: New; moved from
	gcc/testsuite/c-c++-common/gomp/.
	* testsuite/libgomp.c-c++-common/critical-hint-2.c: Likewise.
	* testsuite/libgomp.fortran/critical-hint-1.f90: New; moved
	from gcc/testsuite/gfortran.dg/gomp/.
	* testsuite/libgomp.fortran/critical-hint-2.f90: Likewise.

gcc/testsuite/ChangeLog:

	* c-c++-common/gomp/critical-hint-1.c: Moved to libgomp/.
	* c-c++-common/gomp/critical-hint-2.c: Moved to libgomp/.
	* gfortran.dg/gomp/critical-hint-1.f90: Moved to libgomp/.
	* gfortran.dg/gomp/critical-hint-2.f90: Moved to libgomp/.