Revert libtool changes and regenerated configs

Top level:
	* libtool.m4: Reverted to version prior to 2014-01-13
	* ltmain.sh: Likewise.
	* ltoptions.m4: Likewise.
	* ltversion.m4: Likewise.
	* lt~obsolete.m4: Likewise.

bfd:
	* aclocal.m4: Regnerated.
	* configure: Regnerated.
	* po/SRC-POTFILES.in: Regnerated.
	* po/bfd.pot: Regnerated.

bfd/doc:
	* Makefile.in: Regnerated.