Use gstddef.h, with doublequotes.

From-SVN: r4374

gcc/objc/hash.h

@@ -27,7 +27,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #ifndef __hash_INCLUDE_GNU
 #define __hash_INCLUDE_GNU
 
-#include <stddef.h>
+#include "gstddef.h"
 
 /*
  * This data structure is used to hold items

gcc/objc/objc.h

@@ -30,7 +30,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 extern "C" {
 #endif
 
-#include <stddef.h>
+#include "gstddef.h"
 
 /*
 ** Definition of the boolean type.  

gcc/objc/runtime.h

@@ -31,7 +31,7 @@ You should have received a copy of the GNU General Public License along with
 #include <ctype.h>
 
 #include "stdarg.h"		/* for varargs and va_list's */
-#include "stddef.h"		/* so noone else will get system versions */
+#include "gstddef.h"		/* so noone else will get system versions */
 #include "assert.h"
 
 #include "objc/objc.h"		/* core data types */

gcc/objc/sarray.h

@@ -39,7 +39,7 @@ extern const char* __objc_sparse2_id;
 extern const char* __objc_sparse3_id;
 #endif
 
-#include <stddef.h>
+#include "gstddef.h"
 
 extern int nbuckets;		/* for stats */
 extern int nindices;