Make checklicenses ignore tools\telemetry\third_party\gs_util.

tools/checklicenses/checklicenses.py

 #!/usr/bin/env python
 # 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.
 
 """Makes sure that all files contain proper licensing information."""
 
 
 import json
 import optparse
@@ skipping 380 matching lines @@
     ],
     'tools/python/google/__init__.py': [
         'UNKNOWN',
     ],
     'tools/stats_viewer/Properties/AssemblyInfo.cs': [
         'UNKNOWN',
     ],
     'tools/symsrc/pefile.py': [
         'UNKNOWN',
     ],
+    # Not shipped, downloaded on trybots sometimes.
+    'tools/telemetry/third_party/gsutil': [
+        'UNKNOWN',
+    ],
     'tools/telemetry/third_party/pyserial': [
         # https://sourceforge.net/p/pyserial/feature-requests/35/
         'UNKNOWN',
     ],
     'v8/test/cctest': [  # http://crbug.com/98597
         'UNKNOWN',
     ],
     'v8/src/third_party/kernel/tools/perf/util/jitdump.h': [  # http://crbug.com/391716
         'UNKNOWN',
     ],
@@ skipping 123 matching lines @@
                            action='store_true',
                            default=False,
                            help='Ignore path-specific license whitelist.')
   option_parser.add_option('--json', help='Path to JSON output file')
   options, args = option_parser.parse_args()
   return check_licenses(options, args)
 
 
 if '__main__' == __name__:
   sys.exit(main())