Fix python scripts in src/ppapi/

ppapi/generators/idl_propertynode.py

Index: ppapi/generators/idl_propertynode.py
diff --git a/ppapi/generators/idl_propertynode.py b/ppapi/generators/idl_propertynode.py
old mode 100644
new mode 100755
index caf0974fc1e15898c4478e636b36a5553235bc93..8f7461877da1c96ed592fa121b88f12e3aaa57bc
--- a/ppapi/generators/idl_propertynode.py
+++ b/ppapi/generators/idl_propertynode.py
@@ -1,5 +1,4 @@
-#!/usr/bin/python
-#
+#!/usr/bin/env python
 # Copyright (c) 2011 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.
@@ -180,6 +179,7 @@ def MultiParentTest():
   if not errors: InfoOut.Log('Passed MultiParentTest')
   return errors
 
+
 def Main():
   errors = 0
   errors += PropertyTest()
@@ -191,6 +191,6 @@ def Main():
     return  -1
   return 0
 
+
 if __name__ == '__main__':
   sys.exit(Main())
-