* sysdep/x86-64/locks.h: Enable use of either file on either

	target to support multilibs from one to the other.
	* sysdep/i386/locks.h: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@119276 138bc75d-0d04-0410-961f-82ee72b054a4