**/*.py: use /usr/bin/env to find python

pnacl/driver/tests/strip_test.py

-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Tests of the pnacl driver.
 
 This tests that strip works on various kinds of files.
 """
 
 
@@ skipping 104 matching lines @@
       obj = self.generateObjWithDebug(src, is_native=True)
       ar = self.generateArchive([obj])
       self.stripFileAndCheck(ar)
       src2 = self.getSource(1)
       obj2 = self.generateObjWithDebug(src2, is_native=True)
       ar2 = self.generateArchive([obj, obj2])
       self.stripFileAndCheck(ar2)
 
 if __name__ == '__main__':
   unittest.main()