Migrate grub-mkimage.c to argp.

* Makefile.util.def (grub-mkimage): Add util/argp_common.c.
	(grub-setup): Likewise.
	* util/grub-setup.c (print_version): Move to ...
	* util/argp_common.c (print_version): ... here.
	* util/grub-setup.c (argp_program_version_hook): Move to ...
	* util/argp_common.c (argp_program_version_hook): ... here.
	* util/grub-setup.c (argp_parser): Add exit (1) on fatal error for
	safety.
	* util/grub-mkimage.c (main): Migrate to argp.

util/argp_common.c

@@ -0,0 +1,35 @@
+/* grub-setup.c - make GRUB usable */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#define _GNU_SOURCE	1
+#include "progname.h"
+#include <argp.h>
+
+/* Print the version information.  */
+static void
+print_version (FILE *stream, struct argp_state *state)
+{
+  fprintf (stream, "%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
+}
+void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
+
+/* Set the bug report address */
+const char *argp_program_bug_address = "<"PACKAGE_BUGREPORT">";