This starts to fix the scripts so that they load from /usr/lib/crosutils

check_control_files.sh

 #!/bin/bash
 
 # 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.
 
 # This script will check all existing AutoTest control files for correctness.
 
 # Set pipefail so it will capture any nonzer exit codes
 set -o pipefail
 
-. "$(dirname "$0")/common.sh"
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local path
+
+  SCRIPT_ROOT=
+  for path in "${common_paths[@]}"; do
+    if [ -r "${path}/common.sh" ]; then
+      SCRIPT_ROOT=${path}
+      break
+    fi
+  done
+}
+
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
 
 AUTOTEST_ROOT=${SRC_ROOT}/third_party/autotest/files
 CHECKSCRIPT=${AUTOTEST_ROOT}/utils/check_control_file_vars.py
 SITE_TESTS=${AUTOTEST_ROOT}/client/site_tests
 
 find $SITE_TESTS -maxdepth 2 -name control | xargs -n1 $CHECKSCRIPT
 
 if [ $? -ne 0 ]
 then
   exit 1
 fi