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

bin/cros_sign_to_ssd

Index: bin/cros_sign_to_ssd
diff --git a/bin/cros_sign_to_ssd b/bin/cros_sign_to_ssd
index d961de1a37b4c69103380eb491068e6033382a95..64960cef721954ef45af0ec335190d20c3aee210 100755
--- a/bin/cros_sign_to_ssd
+++ b/bin/cros_sign_to_ssd
@@ -7,11 +7,33 @@
 # Script to resign the kernel partition generated in the output of build_image
 # with SSD keys.
 
-# Load common constants.  This should be the first executable line.
-# The path to common.sh should be relative to your script's location.
-. "$(dirname "$0")/../common.sh"
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils "$(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
 
-. "$(dirname "$0")/../chromeos-common.sh"  # for partoffset and partsize
+# Load functions and constants for chromeos-install
+. "/usr/lib/installer/chromeos-common.sh" || \
+  die "Unable to load /usr/lib/installer/chromeos-common.sh"
 
 locate_gpt
 
@@ -44,7 +66,7 @@ fi
 # ../../tests/devkeys/ \
 # /.../build/images/x86-mario/0.8.68.2/chromiumos_test_ssd_image.bin
 
-VBOOT_DIR="$(dirname "$0")/../../platform/vboot_reference"
+VBOOT_DIR="${SRC_ROOT}/platform/vboot_reference"
 if [ ! -d "${VBOOT_DIR}" ]; then
   die "VBOOT DIR NOT FOUND at \'${VBOOT_DIR}\' .."
 fi