patch by Jeffrey Yasskin for porting to Ubuntu Hardy. Everything was accepted except there were some bug fixes needed in <locale> for the __nolocale_* series. For the apple branch I ended up using templates instead of the var_args solution because it seemed both safer and more efficient.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@104516 91177308-0d34-0410-b5e6-96231b3b80d8

include/cstddef

@@ -34,6 +34,8 @@ Types:
 */
 
 #include <__config>
+#define __need_ptrdiff_t
+#define __need_size_t
 #include <stddef.h>
 
 #pragma GCC system_header