opts-common.c: Include options.h.

opts-common.c: Include options.h.

	* opts-common.c: Include options.h.
	(integral_argument): Move from opts.c.
	(decode_cmdline_option): New.  Based on read_cmdline_option.
	* opts.c (integral_argument): Move to opts-common.c.
	(read_cmdline_option): Move most contents to
	decode_cmdline_option.  Use %qs in diagnostics.
	* opts.h (CL_ERR_DISABLED, CL_ERR_MISSING_ARG, CL_ERR_WRONG_LANG,
	CL_ERR_UINT_ARG, struct cl_decoded_option, integral_argument,
	decode_cmdline_option): New.

testsuite:
	* gcc.dg/funroll-loops-all.c: Update expected error.

From-SVN: r160639