* elf32-bfin.c (bfin_howto_table): Set src_mask to 0 for all relocs.

	(bfin_imm16_reloc): Always add in the addend.  Don't fetch existing
	contents from section.
	(bfin_relocate_section): Rework so as to not call special_functions.
	Handle the relocation stack here.  Treat pcrel24 relocs specially.