Fix build of clang with gcc-4.4: #include <cstdio> was missing.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@79916 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBlocks.cpp b/lib/CodeGen/CGBlocks.cpp
index dad433f..5156d48 100644
--- a/lib/CodeGen/CGBlocks.cpp
+++ b/lib/CodeGen/CGBlocks.cpp
@@ -17,6 +17,8 @@
 #include "llvm/Module.h"
 #include "llvm/Target/TargetData.h"
 #include <algorithm>
+#include <cstdio>
+
 using namespace clang;
 using namespace CodeGen;