Move tool_output_file into its own file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115973 91177308-0d34-0410-b5e6-96231b3b80d8

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>