common.opt: More -f switches.

common.opt: More -f switches.

	* common.opt: More -f switches.
	* opts.c (common_handle_options): Handle them.
	* toplev.c (time_report): Make extern.
	(f_options): USe flag_dummy.
	(decode_f_option): No need to use f_options now.
	* toplev.h (flag_cprop_registers, flag_ssa, flag_ssa_ccp,
	flag_ssa_dce, time_report, flag_new_regalloc): Make extern.

From-SVN: r68328