Replace std::iostreams with raw_ostream in TableGen.
 - Sorry, I can't help myself.

 - No intended functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74742 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TableGenBackend.cpp b/utils/TableGen/TableGenBackend.cpp
index 87a1b3d..b3e33b5 100644
--- a/utils/TableGen/TableGenBackend.cpp
+++ b/utils/TableGen/TableGenBackend.cpp
@@ -16,7 +16,7 @@
 using namespace llvm;
 
 void TableGenBackend::EmitSourceFileHeader(const std::string &Desc,
-                                           std::ostream &OS) const {
+                                           raw_ostream &OS) const {
   OS << "//===- TableGen'erated file -------------------------------------*-"
        " C++ -*-===//\n//\n// " << Desc << "\n//\n// Automatically generate"
        "d file, do not edit!\n//\n//===------------------------------------"