mojo: Update PRESBUMIT.py

mojo/python/tests/bindings_structs_unittest.py

 # Copyright 2014 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.
 
 import math
 import unittest
 
-# pylint: disable=F0401
+# pylint: disable=E0611,F0401
 import mojo.system
 
 # Generated files
 # pylint: disable=F0401
 import regression_tests_mojom
 import sample_import_mojom
 import sample_import2_mojom
 import sample_service_mojom
 
 
@@ skipping 189 matching lines @@
     with self.assertRaises(TypeError):
       p = sample_import_mojom.Point(c=0)
 
   def testCyclicDefinition(self):
     a = regression_tests_mojom.A()
     b = regression_tests_mojom.B()
     self.assertIsNone(a.b)
     self.assertIsNone(b.a)
     a.b = b
     self.assertIs(a.b, b)