* config/openbsd.opt: New.
	* config.gcc (alpha*-*-openbsd*,
	i[34567]86-*-openbsd2.*|i[34567]86-*openbsd3.[0123],
	i[34567]86-*-openbsd*, m68k*-*-openbsd*, mips*-*-openbsd*,
	sparc64-*-openbsd*, vax-*-openbsd*): Use openbsd.opt.

From-SVN: r168358