Handle stdin/stdout/stderr on Windows

runtime/bin/builtin.dart

 // Copyright (c) 2011, 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.
 
 #library("builtin");
 
 void print(arg) {
   _Logger._printString(arg.toString());
 }
 
 void exit(int status) {
   if (status is !int) {
     throw new IllegalArgumentException("int status expected");
   }
   _exit(status);
 }
 
 Socket _stdin;
 OutputStream get stdin() {
   if (_stdin == null) {
     _stdin = new _Socket._internalReadOnly();
-    _stdin._id = 0;
+    _getStdioHandle(_stdin, 0);
   }
   return _stdin.inputStream;
 }
 
 Socket _stdout;
 OutputStream get stdout() {
   if (_stdout == null) {
     _stdout = new _Socket._internalWriteOnly();
-    _stdout._id = 1;
+    _getStdioHandle(_stdout, 1);
   }
   return _stdout.outputStream;
 }
 
 Socket _stderr;
 OutputStream get stderr() {
   if (_stderr == null) {
     _stderr = new _Socket._internalWriteOnly();
-    _stderr._id = 2;
+    _getStdioHandle(_stderr, 2);
   }
   return _stderr.outputStream;
 }
 
 _exit(int status) native "Exit";
 
+_getStdioHandle(Socket socket, int num) native "Socket_GetStdioHandle";
+
 class _Logger {
   static void _printString(String s) native "Logger_PrintString";
 }