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

check_control_files.sh

Index: check_control_files.sh
diff --git a/check_control_files.sh b/check_control_files.sh
index 1f20db9cfde006348884a1e90e1b797c9d228ae7..1fffcbe8a088d01a8e17acd7ff5b0e7b04c01c7e 100755
--- a/check_control_files.sh
+++ b/check_control_files.sh
@@ -9,7 +9,26 @@
 # Set pipefail so it will capture any nonzer exit codes
 set -o pipefail
 
-. "$(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 ---
 
 AUTOTEST_ROOT=${SRC_ROOT}/third_party/autotest/files
 CHECKSCRIPT=${AUTOTEST_ROOT}/utils/check_control_file_vars.py