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

bin/cros_overlay_list

Index: bin/cros_overlay_list
diff --git a/bin/cros_overlay_list b/bin/cros_overlay_list
index 7031068261db71568b91fabc5147c27476a6f2c0..238f0974ead85e1d63c333a41cd62b601a79a0fa 100755
--- a/bin/cros_overlay_list
+++ b/bin/cros_overlay_list
@@ -6,24 +6,26 @@
 
 # This script generates the list of board overlays and variants.
 
+# --- 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 scripts
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
 # location.
-common_paths="/usr/lib/crosutils $(dirname "$0")/.."
-
-for path in ${common_paths} ; do
-  if [ -f "${path}/common.sh" ] ; then
-    COMMON_SH="${path}/common.sh"
-    break
-  fi
-done
-
-if [ -z "${COMMON_SH}" ] ; then
-  error "common.sh not found in search path (${common_paths})"
-  exit 1
-fi
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils "$(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
+}
 
-. "${COMMON_SH}"
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
 
 get_default_board