* elf64-ppc.c (struct ppc64_elf_obj_tdata): Remove "has_dotsym"

	* elf64-ppc.c (struct ppc64_elf_obj_tdata): Remove "has_dotsym"
	and union.
	(struct ppc_link_hash_entry): Add "next_dot_sym".
	(struct ppc_link_hash_table): Add "dot_syms".
	(link_hash_newfunc): Make list of syms starting with a dot.
	(ppc_get_stub_entry, adjust_opd_syms): Adjust.
	(ppc64_elf_add_symbol_hook): Don't set has_dotsym.
	(struct add_symbol_adjust_data): Delete.
	(add_symbol_adjust): Simplify params and return.
	(ppc64_elf_check_directives): Just process the "dot_syms" lists,
	not all syms.