opts.h (struct cl_option_handler_func): Make handler take cl_decoded_option structure as parameter, not individual elements.

	* opts.h (struct cl_option_handler_func): Make handler take
	cl_decoded_option structure as parameter, not individual elements.
	(struct cl_option_handlers): Make callbacks take cl_decoded_option
	structure as parameter, not individual elements.
	(handle_option): Take cl_decoded_option structure as parameter,
	not individual elements.
	(handle_generated_option): Declare.
	* opts-common.c (handle_option): Take cl_decoded_option structure
	as parameter, not individual elements.  Update calls to callback
	and handler functions.
	(handle_generated_option): New.
	(read_cmdline_option): Update calls to callback functions and
	handle_option.
	* opts.c (common_handle_option, complain_wrong_lang,
	unknown_option_callback, post_handling_callback,
	lang_handle_option, target_handle_option): Take cl_decoded_option
	structure as parameter, not individual elements.
	(lang_handle_option, target_handle_option, common_handle_option):
	Assert option has at most one argument.
	(enable_warning_as_error): Call handle_generated_option instead of
	handle_option.  Do not pass -Werror argument as argument of
	generated option.

c-family:
	* c-opts.c (c_common_handle_option): Call handle_generated_option
	instead of handle_option.

From-SVN: r163095