Rename F_{None,Text,Append} to OF_{None,Text,Append}. NFC

F_{None,Text,Append} are kept for compatibility since r334221.

llvm-svn: 367800
diff --git a/llvm/lib/Support/raw_ostream.cpp b/llvm/lib/Support/raw_ostream.cpp
index 2baccaa..16e56ed 100644
--- a/llvm/lib/Support/raw_ostream.cpp
+++ b/llvm/lib/Support/raw_ostream.cpp
@@ -843,7 +843,7 @@
 raw_ostream &llvm::outs() {
   // Set buffer settings to model stdout behavior.
   std::error_code EC;
-  static raw_fd_ostream S("-", EC, sys::fs::F_None);
+  static raw_fd_ostream S("-", EC, sys::fs::OF_None);
   assert(!EC);
   return S;
 }