Export GCLIENT_ROOT from make_autotest

src/scripts/make_autotest.sh

 #!/bin/bash
 
 # Copyright (c) 2009 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 script makes autotest client tests inside an Ubuntu chroot
 # environment.  The idea is to compile any platform-dependent autotest
 # client tests in the build environment, since client systems under
 # test lack the proper toolchain.
 #
-# The user can enter_chroot later and run autotest against an ssh
-# enabled test client system, or install the compiled client tests
-# directly onto the rootfs image, using mod_image_for_test.
+# The user can later run autotest against an ssh enabled test client system, or
+# install the compiled client tests directly onto the rootfs image, using
+# mod_image_for_test.sh.
 
 . "$(dirname "$0")/common.sh"
 
 # Script must be run inside the chroot
 assert_inside_chroot
 
 # More useful help
 FLAGS_HELP="usage: $0 [flags]"
 
 # parse the command-line
@@ skipping 25 matching lines @@
       touch ${sub_dir}/__init__.py
     done
   touch ${base_dir}/__init__.py
   done
 }
 
 cd ${AUTOTEST_DEST}
 touchInitPy client/tests client/site_tests
 touch __init__.py
 
+# Export GCLIENT_ROOT so that tests have access to the source and build trees
+export GCLIENT_ROOT
+
 # run the magic test setup script.
 client/bin/autotest client/site_tests/setup/control