mn10300.c: New file for Matsushita MN10300 port.

        * mn10300/mn10300.c: New file for Matsushita MN10300 port.
        * mn10300/{mn10300.h,mn10300.md,t-mn10300,xm-mn10300.h}: Likewise.
        * config.sub: Recognize mn10300 as a basic machine type.
        * configure: Similarly.
        * ginclude/stdarg.h: mn10300 is little endian.
        * ginclude/varargs.h: Likewise.

From-SVN: r13281

gcc/ginclude/stdarg.h

@@ -81,7 +81,7 @@ void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
 /* We cast to void * and then to TYPE * because this avoids
    a warning about increasing the alignment requirement.  */
 
-#if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__)
+#if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__) || defined (__mn10300__)
 /* This is for little-endian machines; small args are padded upward.  */
 #define va_arg(AP, TYPE)						\
  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),	\

gcc/ginclude/varargs.h

@@ -100,7 +100,7 @@ typedef void *__gnuc_va_list;
   (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
 #endif
 
-#if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__)
+#if defined (__arm__) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__) || defined (__mn10300__)
 /* This is for little-endian machines; small args are padded upward.  */
 #define va_arg(AP, TYPE)						\
  (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),	\