* c-opts.c (cpp_opts): New.
	(COMMAND_LINE_OPTIONS): Add switches from cppinit.c.
	(c_common_decode_options): Handle cpplib switches.
	(c_common_init_options): Set cpp_opts.
	* cppinit.c (COMMAND_LINE_OPTIONS): Move some switches to c-opts.c.
	(cpp_handle_option): Similarly.

From-SVN: r56119