lastchange: use shell=True on Windows

build/util/lastchange.py

 #!/usr/bin/env python
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 lastchange.py -- Chromium revision fetching utility.
 """
 
 import optparse
@@ skipping 42 matching lines @@
 
   Errors are swallowed.
 
   Returns:
     a VersionInfo object or None on error.
   """
   try:
     proc = subprocess.Popen(['svn', 'info'],
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE,
-                            cwd=directory)
+                            cwd=directory,
+                            shell=(sys.platform=='win32'))
   except OSError:
     # command is apparently either not installed or not executable.
     return None
   if not proc:
     return None
 
   attrs = {}
   for line in proc.stdout:
     line = line.strip()
     if not line:
@@ skipping 74 matching lines @@
     if out_file:
       WriteIfChanged(out_file, contents)
     else:
       sys.stdout.write(contents)
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())