Move tool_output_file into its own file.

llvm-svn: 115973
diff --git a/llvm/tools/opt/GraphPrinters.cpp b/llvm/tools/opt/GraphPrinters.cpp
index 9de7d6a..a1b518f 100644
--- a/llvm/tools/opt/GraphPrinters.cpp
+++ b/llvm/tools/opt/GraphPrinters.cpp
@@ -19,7 +19,7 @@
 #include "llvm/Value.h"
 #include "llvm/Analysis/CallGraph.h"
 #include "llvm/Analysis/Dominators.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/ToolOutputFile.h"
 using namespace llvm;
 
 template<typename GraphType>