Fix incorrect handling of closing stderr on Windows

runtime/bin/file_win.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/file.h"
 
 #include <fcntl.h>  // NOLINT
@@ skipping 27 matching lines @@
 
 
 File::~File() {
   Close();
   delete handle_;
 }
 
 
 void File::Close() {
   ASSERT(handle_->fd() >= 0);
-  if (handle_->fd() == _fileno(stdout)) {
+  if (handle_->fd() == _fileno(stdout) || handle_->fd() == _fileno(stderr)) {
     int fd = _open("NUL", _O_WRONLY);
     ASSERT(fd >= 0);
     _dup2(fd, handle_->fd());
     close(fd);
   } else {
     int err = close(handle_->fd());
     if (err != 0) {
       Log::PrintErr("%s\n", strerror(errno));
     }
   }
@@ skipping 625 matching lines @@
     return kIdentical;
   } else {
     return kDifferent;
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)