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

emit_gpt_scripts.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.
 #
 # Emit scripts to pack and unpack the partitions from a GPT disk image.
 
-# Load common constants.  This should be the first executable line.
-# The path to common.sh should be relative to your script's location.
-. "$(dirname "$0")/common.sh"
-. "$(dirname "$0")/chromeos-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 ---
+
+# Need to be inside the chroot to load chromeos-common.sh
+assert_inside_chroot
+
+# Load functions and constants for chromeos-install
+. "/usr/lib/installer/chromeos-common.sh" || \
+  die "Unable to load /usr/lib/installer/chromeos-common.sh"
 
 set -e
 
 # Usage
 IMAGE=${1:-}
 DIR=${2:-}
 if [[ -z "$IMAGE" || -z "$DIR" ]]; then
   echo "Usage: $0 GPT_DEVICE DIRECTORY" 1>&2
   exit 1
 fi
@@ skipping 27 matching lines @@
     echo "dd if=$loc of=$file bs=512 skip=$start count=$size" \
       >> "$UNPACK"
     echo \
       "dd if=$file of=$loc bs=512 seek=$start count=$size conv=notrunc" \
       >> "$PACK"
   done
 
 chmod +x "$PACK" "$UNPACK"
 
 rm $TMP