Add explicit iostream #includes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25513 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 120b9f5..b28d89c 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -74,6 +74,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/ADT/Statistic.h"
 #include <cmath>
+#include <iostream>
 #include <algorithm>
 using namespace llvm;