cython: Fix creation error when directory is created by a parallel process

third_party/cython/cp_python_binary_modules.py

 # Copyright 2014 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.
 
 import argparse
 import os
 import shutil
 import sys
 
 def touch(fname):
@@ skipping 11 matching lines @@
                   'hierarchy.')
   parser.add_argument('timestamp', help='The timetsamp file.')
   parser.add_argument('lib_dir', help='The directory containing the modules')
   parser.add_argument('destination_dir',
                       help='The destination directory of the module')
   parser.add_argument('mappings', nargs='+',
                       help='The mapping from module to library.')
   opts = parser.parse_args()
 
   if not os.path.exists(opts.destination_dir):
-    os.makedirs(opts.destination_dir)
+    try:
+      os.makedirs(opts.destination_dir)
+    except:
+      # Ignore errors on directory creation.
+      pass
 
   for mapping in opts.mappings:
     [module, library] = mapping.split('=')
     shutil.copy(os.path.join(opts.lib_dir, library),
                 os.path.join(opts.destination_dir, module))
 
   touch(opts.timestamp)
 
 if __name__ == '__main__':
   main()