Auto-generated dependencies for rx-parse.o and rl78-parse.o

Auto-generated dependencies for rx-parse.o and rl78-parse.o

I noticed a while ago that the rx-elf gas gprel test regressed for no
apparent reason.  It turns out that the problem was rx-parse.y using
BFD_RELOC_RX_* values, which may change when other targets add new
relocs.  If rx-parse.o doesn't depend on bfd.h, it won't be recompiled.

	* Makefile.am (EXTRA_as_new_SOURCES): Add config/rl78-parse.y and
	config/rx-parse.y.  Move config/bfin-parse.y.
	(bfin-parse.@OBJEXT@, rl78-parse.@OBJEXT@, rx-parse.@OBJEXT@): Delete.
	($(srcdir)/config/rl78-defs.h): New rule.
	* Makefile.in: Regenerate.