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/DataStructure/DataStructureStats.cpp b/lib/Analysis/DataStructure/DataStructureStats.cpp
index 4986550..f4aff30 100644
--- a/lib/Analysis/DataStructure/DataStructureStats.cpp
+++ b/lib/Analysis/DataStructure/DataStructureStats.cpp
@@ -18,7 +18,7 @@
 #include "llvm/Pass.h"
 #include "llvm/Support/InstVisitor.h"
 #include "llvm/ADT/Statistic.h"
-#include <vector>
+#include <iostream>
 using namespace llvm;
 
 namespace {