* elf64-ppc.c (add_symbol_adjust): Don't create fake descriptor

	* elf64-ppc.c (add_symbol_adjust): Don't create fake descriptor
	syms when doing a relocatable link.
	(ppc64_elf_gc_mark_hook): Check that syms are defined before looking
	at u.def.section.
	(ppc64_elf_tls_setup): Likewise.
	(ppc64_elf_edit_opd): Don't use an undefined func desc sym.