Merge some FRV FDPIC changes into the Blackfin code.

	Merge some FRV FDPIC changes into the Blackfin code.
	* elf32-bfin.c (struct bfinfdpic_elf_link_hash_table): Add pointer to
	summary reloc information.
	(bfinfdpic_dynamic_got_plt_info): New.
	(_bfin_create_got_section): Create the PLT section here.
	(elf32_bfinfdpic_create_dynamic_sections): Not here.
	(_bfinfdpic_count_nontls_entries): Move out of...
	(_bfinfdpic_count_got_plt_entries): ... here.
	(_bfinfdpic_count_relocs_fixups): Likewise.
	(_bfinfdpic_reset_got_plt_entries): New.
	(_bfinfdpic_size_got_plt): Move out of...
	(elf32_bfinfdpic_size_dynamic_sections): ... here.
	(bfinfdpic_relocate_section): Be careful not to call
	_bfinfdpic_add_rofixup or _bfinfdpic_add_dyn_reloc for deleted relocs.
	(bfinfdpic_check_discarded_relocs, bfinfdpic_elf_discard_info):
	New functions.
	(elf_backend_discard_info): Define for FD-PIC.