Pack firmware into an image and do update in factory install process.

src/platform/memento_softwareupdate/memento_updater.sh

Index: src/platform/memento_softwareupdate/memento_updater.sh
diff --git a/src/platform/memento_softwareupdate/memento_updater.sh b/src/platform/memento_softwareupdate/memento_updater.sh
index b39a3ce0fb23aa51fa36c8f6514542033e3dbe78..d5ff4478e4dfadc0014534aa4fc58025c6d92a42 100755
--- a/src/platform/memento_softwareupdate/memento_updater.sh
+++ b/src/platform/memento_softwareupdate/memento_updater.sh
@@ -175,7 +175,7 @@ then
   log "didnt find good local device. local: $LOCAL_DEV install: $INSTALL_DEV"
   exit 1
 fi
-if [ ! -b "$INSTALL_DEV" ]
+if [ ! -b "$INSTALL_DEV" -a ! "${FLAGS_force_track}" = "firmware-channel" ]
 then
   log "didnt find good install device. local: $LOCAL_DEV install: $INSTALL_DEV"
   exit 1
@@ -320,6 +320,15 @@ if [ $FLAGS_skip_postinst -eq $FLAGS_FALSE ]; then
   # postinstall on new partition succeeded.
 fi
 
+if [ "${FLAGS_force_track}" = "firmware-channel" ]; then
+  log execute firmware-install script
+  INSTALL_SCRIPT="${FLAGS_dst_partition}"
+  chmod +x "${INSTALL_SCRIPT}"
+  pushd "$(dirname "${INSTALL_SCRIPT}")" > /dev/null
+  eval "${INSTALL_SCRIPT}" >> "$MEMENTO_AU_LOG"
+  popd > /dev/null
+fi
+
 if [ -z "${FLAGS_dst_partition}" ]; then
   # mark update as complete so we don't try to update again
   touch "$UPDATED_COMPLETED_FILE"