bfd/

bfd/
	* elf64-ppc.c (follow_link, elf_follow_link, ppc_follow_link): New
	functions.  Use throughout.
	(ppc64_elf_copy_indirect_symbol): Set direct symbol "oh" field
	from indirect symbol.
	(lookup_fdh): Rename from get_fdh.  Follow indirect sym links.
	(add_symbol_adjust): Simplify.
	(defined_code_entry, defined_func_desc): New functions.
	(ppc64_elf_gc_keep): Follow indirect sym links.  Use defined_code_entry.
	(ppc64_elf_gc_mark_dynamic_ref): Use defined_func_desc and
	defined_code_entry to follow indirect sym links.
	(ppc64_elf_gc_mark_hook, func_desc_adjust): Likewise.
	(ppc_type_of_stub): Follow indirect sym links.
	(toc_adjusting_stub_needed): Likewise.
	(ppc_build_one_stub): Likewise.  Make undefined dot-symbols weak
	rather than defining them at stub.
	(ppc64_elf_relocate_section): Rewrite call test to avoid multiple
	assignments in test.
ld/testsuite/
	* ld-powerpc/tlsso.d: Update.
	* ld-powerpc/tlsso.r: Update.
	* ld-powerpc/tlstocso.d: Update.
	* ld-powerpc/tlstocso.r: Update.