* options.h (General_options): Add --toc-sort/--no-toc-sort.

	* options.h (General_options): Add --toc-sort/--no-toc-sort.
	Replace no_toc_optimize with toc_optimize.
	* output.h (Output_section::input_sections): Provide non-const variant.
	* powerpc.cc (Powerpc_relobj::has_small_toc_reloc_,
	set_has_small_toc_reloc, has_small_toc_reloc): New variable and
	accessors.
	(Target_powerpc::Scan::local, global): Call set_has_small_toc_reloc.
	(class Sort_toc_sections): New.
	(Target_powerpc::do_finalize_sections): Sort toc sections.
	(Target_powerpc::Relocate::relocate): Update toc_optimize test.