Change the python hashbang in cppint.py

Review URL: https://chromiumcodereview.appspot.com/10391070

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@136603 0039d316-1c4b-4281-b951-d872f2087c98

cpplint.py

-#!/usr/bin/python2.4
+#!/usr/bin/env python
 #
 # Copyright (c) 2009 Google Inc. All rights reserved.
 #