bfd/

bfd/
	* elf-bfd.h (_bfd_elf_gc_mark): Declare.
	* elflink.c (elf_link_input_bfd): Formatting.
	(_bfd_elf_gc_mark): Rename from elf_gc_mark and make global.  Adjust
	all callers.
	* elf64-ppc.c (struct ppc_link_hash_entry): Remove is_entry.
	(link_hash_newfunc): Don't set it.
	(ppc64_elf_copy_indirect_symbol): Nor copy it.
	(ppc64_elf_mark_entry_syms): Delete.
	(ppc64_elf_gc_mark_hook): Mark entry syms here.  Also mark opd
	sections.  Use get_opd_info.
	* elf64-ppc.h (ppc64_elf_mark_entry_syms): Delete.
ld/
	* emultempl/ppc64elf.em (ppc_after_open): Delete.
	(LDEMUL_AFTER_OPEN): Don't define.