* object.h (Sized_relobj_file::adjust_local_symbol,

	* object.h (Sized_relobj_file::adjust_local_symbol,
	do_adjust_local_symbol): New functions.
	* object.cc (Sized_relobj_file::do_count_local_symbols): Use the above.
	* powerpc.cc (Powerpc_relobj::do_adjust_local_symbol): New function.
	(Powerpc_relobj::scan_opd_relocs): Warn on unexpected opd relocs
	and irregular opd entry spacing.
	(Powerpc_relobj::do_read_relocs): Add opd size checks.
	(Global_symbol_visitor_opd): New functor.
	(Target_powerpc::do_finalize_sections): Omit global symbols defined
	on deleted opd entries.