* ecoff.c (_bfd_ecoff_set_arch_mach_hook): Don't use hard-coded

	* ecoff.c (_bfd_ecoff_set_arch_mach_hook): Don't use hard-coded
	bfd_mach constants.
	(ecoff_get_magic): Likewise.
	* elf32-v850.c (v850_elf_object_p): Likewise.
	(v850_elf_final_write_processing): Likewise.
	* mipsbsd.c (MY(set_arch_mach)): Likewise.
	(MY(write_object_contents)): Likewise.
	* coff64-rs6000.c (xcoff64_write_object_contents): Likewise.
	* coffcode.h (coff_write_object_contents): Likewise.
	(coff_set_arch_mach_hook): Add comment describing machine == 0.
	Remove unnecessary "machine" assignments.
	(coff_write_relocs): Test for the absolute section sym by testing
	section and flags.

	* pdp11.c (NAME(aout,machine_type)): Like aoutx.h.