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

cros_download_latest_image

 #!/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.
 
 # Downloads the latest buildbot image and prints the path to it.
 # This script only works if you have access to buildbot images.
 
-# 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 ---
 
 get_default_board
 
 DEFINE_string board "$DEFAULT_BOARD" \
   "The name of the board to check for images."
 DEFINE_boolean incremental "${FLAGS_FALSE}" "Download incremental build"
 
 # Parse command line flags.
 FLAGS "$@" || exit 1
 eval set -- "${FLAGS_ARGV}"
@@ skipping 27 matching lines @@
   mkdir -p $LATEST_IMAGE_DIR
   bin/cros_gsdcurl.py $URL_PREFIX/$LATEST_BUILD/image.zip -o \
       $LATEST_IMAGE_DIR/image.zip \
       || die "Could not download image.zip"
   ( cd $LATEST_IMAGE_DIR && unzip -qo image.zip ) \
       || die "Could not unzip image.zip"
 fi
 
 echo $LATEST_IMAGE_DIR
 exit 0