Set svn:executable bit on scripts that are executable.

ppapi/cpp/documentation/doxy_cleanup.py

-#!/usr/bin/python
-
+#!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 '''This utility cleans up the html files as emitted by doxygen so
 that they are suitable for publication on a Google documentation site.
 '''
 
 import optparse
 import os
@@ skipping 118 matching lines @@
             os.path.dirname(os.path.dirname(filename)), 'original_html')
         if not os.path.exists(new_directory):
           os.mkdir(new_directory)
         shutil.move(filename, new_directory)
     except:
       print "Error while processing %s" % filename
       raise
 
   return 0
 
+
 if __name__ == '__main__':
   sys.exit(main())