darwin.opt (dylinker, [...]): New Driver options.

	* config/darwin.opt (dylinker, headerpad_max_install_names,
	keep_private_externs, nofixprebinding, nomultidefs, noprebind,
	noseglinkedit, object, prebind, prebind_all_twolevel_modules,
	preload, private_bundle, pthread, seglinkedit, twolevel_namespace,
	twolevel_namespace_hints, whatsloaded, whyload, y, Mach, X): New
	Driver options.
	* config/darwin.h (LINK_SPEC): Remove '*' after
	headerpad_max_install_names.

From-SVN: r167963