divmodhi.S: Add support for the G10 architecture.

divmodhi.S: Add support for the G10 architecture.

	* config/rl78/divmodhi.S: Add support for the G10 architecture.
	Use START_FUNC and END_FUNC macros to enable linker garbage
	collection.
	* config/rl78/divmodqi.S: Likewise.
	* config/rl78/divmodsi.S: Likewise.
	* config/rl78/mulsi3.S: Likewise.
	* config/rl78/lib2div.c: Remove G10 functions.
	* config/rl78/lib2muls.c: Likewise.
	* config/rl78/t-rl8 (HOST_LIBGCC2_CFLAGS): Define.
	* config/rl78/vregs.h (START_FUNC): New macro.
	(END_FUNC): New macro.

From-SVN: r217463