Add explicit #includes of <iostream>

llvm-svn: 25509
diff --git a/llvm/lib/Transforms/Instrumentation/TraceBasicBlocks.cpp b/llvm/lib/Transforms/Instrumentation/TraceBasicBlocks.cpp
index 2d2a259..66a1b22 100644
--- a/llvm/lib/Transforms/Instrumentation/TraceBasicBlocks.cpp
+++ b/llvm/lib/Transforms/Instrumentation/TraceBasicBlocks.cpp
@@ -23,6 +23,7 @@
 #include "ProfilingUtils.h"
 #include "llvm/Support/Debug.h"
 #include <set>
+#include <iostream>
 using namespace llvm;
 
 namespace {