* grub-core/lib/cmdline.c: New file.
	* include/grub/lib/cmdline.h: Likewise.
	* grub-core/loader/i386/linux.c (grub_cmd_linux): Use
	grub_create_loader_cmdline to create kernel command line.
	* grub-core/loader/i386/pc/linux.c (grub_cmd_linux): Likewise.
	* grub-core/loader/powerpc/ieee1275/linux.c (grub_cmd_linux): Likewise.
	* grub-core/loader/sparc64/ieee1275/linux.c (grub_cmd_linux): Likewise.
	* grub-core/Makefile.core.def (linux16): Add lib/cmdline.c on i386_pc.
	(linux): Add lib/cmdline.c on common.