Add #include <iostream> since Value.h doesn't include it any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14624 91177308-0d34-0410-b5e6-96231b3b80d8

examples/ModuleMaker/ModuleMaker.cpp

@@ -11,6 +11,7 @@
 #include "llvm/Constants.h"
 #include "llvm/Instructions.h"
 #include "llvm/Bytecode/Writer.h"
+#include <iostream>
 
 using namespace llvm;