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

mk_memento_images.sh

Index: mk_memento_images.sh
diff --git a/mk_memento_images.sh b/mk_memento_images.sh
index 7a1074542777575e14729cf7b491f7ac0de6cf0e..9e8b609e0a3ce380a3d2733a13183e3244ec1096 100755
--- a/mk_memento_images.sh
+++ b/mk_memento_images.sh
@@ -10,8 +10,31 @@
 
 set -e
 
+# --- 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_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+
 # Load functions designed for image processing
-if ! . "$(dirname "$0")/lib/cros_image_common.sh"; then
+if ! . "${SCRIPT_ROOT}/lib/cros_image_common.sh"; then
   echo "ERROR: Cannot load required library: lib/cros_image_common.sh; Abort."
   exit 1
 fi