remove build_autotest.sh and change run_remote_tests.sh to use new autotest script.

src/scripts/autotest

 #!/usr/bin/python
 
 # Copyright (c) 2010 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.
 #
 # A python wrapper to call autotest ebuild.
 
 import commands, logging, optparse, os, subprocess, sys
 
@@ skipping 81 matching lines @@
   if MyOptionPaser.help:
     if options.build:
       print
       print 'Options inherited from autotest_client, which is used in build',
       print 'only mode.'
       run([AUTOTEST_CLIENT, '--help'])
     else:
       print
       print 'Options inherited from autoserv:'
       run([AUTOSERV, '--help'])
-    sys.exit(-1)
+    sys.exit(0)
   return options, args
 
 
 def assert_inside_chroot(common_sh):
   status, output = commands.getstatusoutput('/bin/bash -c ". %s && '
                                             'assert_inside_chroot"' % common_sh)
   if status is not 0:
     print >> sys.stderr, output
     sys.exit(status)
 
@@ skipping 93 matching lines @@
   else:
     ssh_key_file = os.path.join(os.path.dirname(me),
                                 'mod_for_test_scripts/ssh_keys/testing_rsa')
     os.chmod(ssh_key_file, 0400)
     run_autoserv(options.board, args)
 
 
 if __name__ == '__main__':
   main()