Move tool_output_file into its own file.

llvm-svn: 115973
diff --git a/llvm/tools/llvm-ld/llvm-ld.cpp b/llvm/tools/llvm-ld/llvm-ld.cpp
index 3bbea9d..73280c6 100644
--- a/llvm/tools/llvm-ld/llvm-ld.cpp
+++ b/llvm/tools/llvm-ld/llvm-ld.cpp
@@ -35,7 +35,7 @@
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/ToolOutputFile.h"
 #include "llvm/System/Signals.h"
 #include "llvm/Config/config.h"
 #include <memory>