* elfxx-mips.c (mips_got_entry): Add more commentary.

	* elfxx-mips.c (mips_got_entry): Add more commentary.
	(mips_elf_local_got_index): Use the hash table entry to record
	the GOT index of forced-local symbols.
	(mips_elf_initialize_tls_index): Rearrange code.  Store the index
	in either the hash table entry or the mips_got_entry, not both.
	Add more commentary.
	(mips_elf_multi_got): Make sure the g->next is nonnull when calling
	mips_elf_initialize_tls_index.

	* ld-mips-elf/tls-hidden3a.s, ld-mips-elf/tls-hidden3b.s,
	* ld-mips-elf/tls-hidden3.d, ld-mips-elf/tls-hidden3.got,
	* ld-mips-elf/tls-hidden3.ld, ld-mips-elf/tls-hidden3.r,
	* ld-mips-elf/tls-hidden4a.s, ld-mips-elf/tls-hidden4b.s,
	* ld-mips-elf/tls-hidden4.got, ld-mips-elf/tls-hidden4.r: New tests.
	* ld-mips-elf/mips-elf.exp: Run them.