Update third_party/psutil and fix the licence issue with it.

tools/checklicenses/checklicenses.py

 #!/usr/bin/python
 # Copyright (c) 2011 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 optparse
 import os.path
@@ skipping 292 matching lines @@
     ],
     'third_party/ocmock/OCMock': [
         'UNKNOWN',
     ],
     'third_party/ply/__init__.py': [
         'UNKNOWN',
     ],
     'third_party/protobuf': [
         'UNKNOWN',
     ],
-    'third_party/psutil': [
-        'UNKNOWN',
-    ],
     'third_party/pyftpdlib/src': [
         'UNKNOWN',
     ],
     'third_party/pylib': [
         'UNKNOWN',
     ],
     'third_party/scons-2.0.1/engine/SCons': [
         'UNKNOWN',
     ],
     'third_party/simplejson': [
@@ skipping 180 matching lines @@
                            'to "../.." relative to the script file, which '
                            'will normally be the repository root.')
   option_parser.add_option('-v', '--verbose', action='store_true',
                            default=False, help='Print debug logging')
   option_parser.add_option('--ignore-suppressions',
                            action='store_true',
                            default=False,
                            help='Ignore path-specific license whitelist.')
   options, args = option_parser.parse_args()
   main(options, args)