[Courgette] Extract qsufsort module and add tests.

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 111 matching lines @@
     ],
     # This contains files copied from elsewhere from the tree. Since the copied
     # directories might have suppressions below (like simplejson), whitelist the
     # whole directory. This is also not shipped code.
     'chrome/common/extensions/docs/server2/third_party': [
         'UNKNOWN',
     ],
     'courgette/third_party/bsdiff_create.cc': [  # http://crbug.com/98095
         'UNKNOWN',
     ],
+    'courgette/third_party/qsufsort.h': [  # http://crbug.com/98095
+        'UNKNOWN',
+    ],
     'native_client': [  # http://crbug.com/98099
         'UNKNOWN',
     ],
     'native_client/toolchain': [
         'BSD GPL (v2 or later)',
         'BSD MIT/X11 (BSD like)',
         'BSD (2 clause) GPL (v2 or later)',
         'BSD (3 clause) GPL (v2 or later)',
         'BSD (4 clause) ISC',
         'BSL (v1.0) GPL',
@@ skipping 504 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())