Add ability to pass a base test root and create results dirs relative.

bin/au_test_harness/cros_au_test_harness.py

 #!/usr/bin/python
 
 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """This module runs a suite of Auto Update tests.
 
   The tests can be run on either a virtual machine or actual device depending
   on parameters given.  Specific tests can be run by invoking --test_prefix.
@@ skipping 219 matching lines @@
   parser.add_option('--public_key', default=None,
                      help='Public key to use on images and updates.')
   parser.add_option('--private_key', default=None,
                      help='Private key to use on images and updates.')
   parser.add_option('-q', '--quick_test', default=False, action='store_true',
                     help='Use a basic test to verify image.')
   parser.add_option('-m', '--remote',
                     help='Remote address for real test.')
   parser.add_option('-t', '--target_image',
                     help='path to the target image.')
+  parser.add_option('--test_results_root', default=None,
+                    help='Root directory to store test results.  Should '
+                         'be defined relative to chroot root.')
   parser.add_option('--test_prefix', default='test',
                     help='Only runs tests with specific prefix i.e. '
                          'testFullUpdateWipeStateful.')
   parser.add_option('-p', '--type', default='vm',
                     help='type of test to run: [vm, real]. Default: vm.')
   parser.add_option('--verbose', default=True, action='store_true',
                     help='Print out rather than capture output as much as '
                          'possible.')
   (options, leftover_args) = parser.parse_args()
 
@@ skipping 37 matching lines @@
       # Can't run in parallel with only one remote device.
       test_suite = _PrepareTestSuite(options)
       test_result = unittest.TextTestRunner(verbosity=2).run(test_suite)
       if not test_result.wasSuccessful(): cros_lib.Die('Test harness failed.')
   finally:
     my_server.Stop()
 
 
 if __name__ == '__main__':
   main()