Fixes stricter includes which result in failures like this:
error: 'ptrdiff_t' does not name a type

Upstream-Status: Unknown, not submitted as 2.7 is very old

Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

Index: llvm-2.7/include/llvm/ADT/SmallVector.h
===================================================================
--- llvm-2.7.orig/include/llvm/ADT/SmallVector.h	2011-05-08 17:07:09.000000000 +0200
+++ llvm-2.7/include/llvm/ADT/SmallVector.h	2011-05-08 17:07:25.000000000 +0200
@@ -19,6 +19,7 @@
 #include <cassert>
 #include <cstring>
 #include <memory>
+#include <cstddef>
 
 #ifdef _MSC_VER
 namespace std {
Index: llvm-2.7/include/llvm/ADT/ilist.h
===================================================================
--- llvm-2.7.orig/include/llvm/ADT/ilist.h	2011-05-08 20:24:57.000000000 +0200
+++ llvm-2.7/include/llvm/ADT/ilist.h	2011-05-08 20:25:12.000000000 +0200
@@ -40,6 +40,7 @@
 
 #include <cassert>
 #include <iterator>
+#include <cstddef>
 
 namespace llvm {
 
Index: llvm-2.7/include/llvm/Use.h
===================================================================
--- llvm-2.7.orig/include/llvm/Use.h	2011-05-08 20:28:21.000000000 +0200
+++ llvm-2.7/include/llvm/Use.h	2011-05-08 20:28:37.000000000 +0200
@@ -28,6 +28,7 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include <iterator>
+#include <cstddef>
 
 namespace llvm {
 
Index: llvm-2.7/include/llvm/ADT/DenseMap.h
===================================================================
--- llvm-2.7.orig/include/llvm/ADT/DenseMap.h	2011-05-08 20:32:11.000000000 +0200
+++ llvm-2.7/include/llvm/ADT/DenseMap.h	2011-05-08 20:32:21.000000000 +0200
@@ -23,6 +23,7 @@
 #include <utility>
 #include <cassert>
 #include <cstring>
+#include <cstddef>
 
 namespace llvm {