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

set_shared_user_password.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.
 
 # Script to set the password for the shared user account.  Stores the
 # MD5crypt'd password to a file, for use by customize_rootfs.sh.
 
-# Load common constants.  This should be the first executable line.
-# The path to common.sh should be relative to your script's location.
-. "$(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 ---
 
 # Script must be run inside the chroot
-restart_in_chroot_if_needed $*
+restart_in_chroot_if_needed "$@"
 
 FLAGS_HELP="USAGE: $0 [flags]"
 
 # Parse command line
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
 
 # Die on any errors.
 set -e
 
 # Get password
 read -p "Enter password for shared user account: " PASSWORD
 
 CRYPTED_PASSWD_FILE=$SCRIPTS_DIR/shared_user_passwd.txt
 CRYPTED_PASSWD="$(echo "$PASSWORD" | openssl passwd -1 -stdin)"
 PASSWORD="gone now"
 
 echo "$CRYPTED_PASSWD" > $CRYPTED_PASSWD_FILE
 
 echo "Shared user password set in $CRYPTED_PASSWD_FILE"