Add #include <iostream> since Value.h does not #include it any more.

llvm-svn: 14622
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGBuilder.cpp
index 470be87..1acc98d 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGBuilder.cpp
@@ -20,6 +20,8 @@
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/InstVisitor.h"
+#include <iostream>
+
 using namespace llvm;
 
 namespace llvm {