* elf32-mips.c (FN_STUB, CALL_STUB, CALL_FP_STUB): Define.

	* elf32-mips.c (FN_STUB, CALL_STUB, CALL_FP_STUB): Define.
	(struct mips_elf_link_hash_entry): Add new fields fn_stub,
	need_fn_sub, call_stub, and call_fp_stub.
	(struct mips_elf_link_hash_table): Add field mips16_stubs_seen.
	(mips_elf_link_hash_newfunc): Initialize new fields.
	(mips_elf_link_hash_table_create): Likewise.
	(mips_elf_relocate_section): Redirect relocations to use mips16
	stubs when appropriate.
	(mips_elf_check_relocs): Attach stub sections to the appropriate
	symbol.  Set need_fn_stub when appropriate.
	(mips_elf_always_size_sections): New static function.
	(mips_elf_check_mips16_stubs): New static function.
	(elf_backend_always_size_sections): Define.
	* elf-bfd.h (struct elf_obj_tdata): Add local_stubs field.