* obstack.c (_): Honor the setting of ENABLE_NLS.  Otherwise,
	this code would end up calling gettext even in packages built
	with --disable-nls.
	* getopt.c (_): Likewise.
	* regex.c (_): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46975 138bc75d-0d04-0410-961f-82ee72b054a4