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

build_kernel_image.sh

Index: build_kernel_image.sh
diff --git a/build_kernel_image.sh b/build_kernel_image.sh
index 7e3a88175c11cfed3934733fa9de88cd4c9140e6..f54bc3b8ec8a9b44358e5f3ed153628a8c0f08ea 100755
--- a/build_kernel_image.sh
+++ b/build_kernel_image.sh
@@ -6,7 +6,26 @@
 
 # Helper script that generates the signed kernel image
 
-. "$(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