* elf32-mips.c (struct mips_got_info): Add assigned_gotno field.

	* elf32-mips.c (struct mips_got_info): Add assigned_gotno field.
	(mips_elf_relocate_got_local): Change return type to boolean.
	Don't assume that the first zero entry is unassigned; instead, use
	assigned_gotno.
	(mips_elf_relocate_section): Check return value of
	mips_elf_relocate_got_local.
	(mips_elf_create_got_section): Initialize assigned_gotno field.