* ecoff.c (ecoff_setup_ext): Renamed from ecoff_build_ext.

	* ecoff.c (ecoff_setup_ext): Renamed from ecoff_build_ext.
	Changed to not actually build the external symbol information, as
	that is now done by the ECOFF back end.
	(ecoff_build_debug): Changed accordingly.
	* ecoff.h (obj_ecoff_set_ext): Declare.   obj-format.c function
	called by ecoff_setup_ext.
	* config/obj-ecoff.c (ecoff_frob_file): If debug_info count is 0,
	set corresponding pointer to NULL.  Don't set raw_size and
	raw_syments.
	(obj_ecoff_set_sym_index): Removed.
	(obj_ecoff_set_ext): New function.
	* config/obj-ecoff.h (obj_set_sym_index): Don't define.
	(obj_ecoff_set_sym_index): Don't declare.
	* config/obj-elf.c (obj_ecoff_set_ext, elf_get_extr,
	elf_set_index): New functions used for ECOFF_DEBUGGING.
	(elf_frob_file): Reworked ECOFF debug generation to use
	new functions in bfd/ecofflink.c.