* subsegs.c: Renamed non-BFD_ASSEMBLER subseg_new to subseg_set.

	* subsegs.c: Renamed non-BFD_ASSEMBLER subseg_new to subseg_set.
	Wrote non-BFD_ASSEMBLER subseg_new.  Now subseg_new always takes a
	section name, and subseg_set always takes a segT.  Changed all
	callers as appropriate.
	* config/obj-coffbfd.c 	(change_to_section): Renamed to
	obj_coff_add_segment.  Corrected.  Made callers use subseg_new.
	* config/obj-coffbfd.h (obj_segment_name, obj_add_segment):
	Define.

Also some more gcc warning removal.