* Many files: Added gettext invocations around user-visible

	* Many files: Added gettext invocations around user-visible
	strings.
	* libbfd-in.h: Added gettext includes and defines.
	* acconfig.h (ENABLE_NLS, HAVE_CATGETS, HAVE_GETTEXT, HAVE_STPCPY,
	HAVE_LC_MESSAGES): Define.
	* configure.in: Call CY_GNU_GETTEXT.  Create po/Makefile.in and
	po/Makefile.
	* Makefile.am (SUBDIRS): Added po.
	(POTFILES): New macro.
	(po/POTFILES.in): New target.
	(SOURCE_HFILES): New macro.
	(HFILES): Use it.
	* po/Make-in, po/POTFILES.in, po/bfd.pot: New files.