added include<iostream> for cerr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2796 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index dfb8a19..df3fdac 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -23,6 +23,7 @@
 #include "Support/STLExtras.h"
 #include <algorithm>
 #include <set>
+#include <iostream>
 using std::string;
 using std::map;
 using std::ostream;