* config.bfd: Rewrite to incorporate the contents of the Makefile

	* config.bfd: Rewrite to incorporate the contents of the Makefile
	fragments by setting shell variables, rather than merely returning
	the name of a Makefile fragment.
	* configure.in: Use shell variables set by config.bfd rather than
	looking at the target Makefile fragment files.  Don't substitute
	target_makefile_frag.  Do substitute TDEFINES.
	* configure: Rebuild.
	* Makefile.in (@target_makefile_frag@): Remove.
	(ALL_CFLAGS): Change $(TDEFINES) to @TDEFINES@.
	* config/*.mt: Remove.