With these changes, the binutils mostly work on the Alpha, except for

With these changes, the binutils mostly work on the Alpha, except for
objdump -r.

	* coffswap.h: Added macros used when accessing several fields;
	default is the same as before.
	(coff_swap_aouthdr_{in,out}): Handle the Alpha ECOFF fields.
	* coff-alpha.c: Defined macros to use the right sizes in
	coffswap.h.
	* libecoff.h: Backend information is now in target vector, not
	BFD.  Start of backend information is COFF backend information.
	* coff-alpha.c, coff-mips.c: Changed accordingly.
	* ecoff.c (ecoff_mkobject): New function.
	(ARMAP_START): Changed into backend information, since Alpha uses
	a different name.
	(ecoff_slurp_armap): Don't overlay archive header.
	* bfd.c: Include libcoff.h.