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

llvm-svn: 79916
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
index dad433f..5156d48 100644
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/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;