[dart:io][windows] Make unicode characters display correctly.

runtime/bin/file_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 @patch class _File {
   @patch static _exists(String path) native "File_Exists";
   @patch static _create(String path) native "File_Create";
   @patch static _createLink(String path, String target)
       native "File_CreateLink";
   @patch static _linkTarget(String path) native "File_LinkTarget";
@@ skipping 37 matching lines @@
   read(int bytes) native "File_Read";
   readInto(List<int> buffer, int start, int end) native "File_ReadInto";
   writeByte(int value) native "File_WriteByte";
   writeFrom(List<int> buffer, int start, int end) native "File_WriteFrom";
   position() native "File_Position";
   setPosition(int position) native "File_SetPosition";
   truncate(int length) native "File_Truncate";
   length() native "File_Length";
   flush() native "File_Flush";
   lock(int lock, int start, int end) native "File_Lock";
+  setTranslation(int translation) native "File_SetTranslation";
 }
 
 
 class _WatcherPath {
   final int pathId;
   final String path;
   final int events;
   int count = 0;
   _WatcherPath(this.pathId, this.path, this.events);
 }
@@ skipping 312 matching lines @@
   void _pathWatchedEnd() {
     _subscription.cancel();
     _controller.close();
   }
 }
 
 
 Uint8List _makeUint8ListView(Uint8List source, int offsetInBytes, int length) {
   return new Uint8List.view(source.buffer, offsetInBytes, length);
 }