[NaCl SDK] Disable relative import python presubmit warnings.

native_client_sdk/PRESUBMIT.py

 # 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.
 
 """Top-level presubmit script for isolate.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
 details on the presubmit API built into gcl.
 """
 
 
 def CommonChecks(input_api, output_api):
   output = []
   disabled_warnings = [
     'F0401',  # Unable to import module
     'R0401',  # Cyclic import
     'W0613',  # Unused argument
+    'W0403',  # relative import warnings
     'E1103',  # subprocess.communicate() generates these :(
     'R0201',  # method could be function (doesn't reference self)
   ]
   black_list = [
     r'src[\\\/]build_tools[\\\/]tests[\\\/].*',
     r'src[\\\/]build_tools[\\\/]sdk_tools[\\\/]third_party[\\\/].*',
     r'src[\\\/]doc[\\\/]*',
     r'src[\\\/]gonacl_appengine[\\\/]*',
   ]
   canned = input_api.canned_checks
@@ skipping 18 matching lines @@
     },
     'tryserver.chromium.win': {
       'win_nacl_sdk': set(['defaulttests']),
       'win_nacl_sdk_build': set(['defaulttests']),
     },
     'tryserver.chromium.mac': {
       'mac_nacl_sdk': set(['defaulttests']),
       'mac_nacl_sdk_build': set(['defaulttests']),
     }
   }