Fix python scripts in src/ppapi/

ppapi/generators/idl_c_proto.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.
 
 """ Generator for C style prototypes and definitions """
 
 import glob
 import os
 import sys
 
@@ skipping 635 matching lines @@
     if f.GetProperty('ERRORS') > 0:
       print 'Skipping %s' % f.GetName()
       continue
     print DefineDepends(node)
     for node in f.GetChildren()[2:]:
       print Define(node, comment=True, prefix='tst_')
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv[1:]))