Allow boot directly into mfg test.

src/platform/memento_softwareupdate/memento_updater.sh

 #!/bin/bash
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This is the autoupdater for Memento. When called it consults Omaha to see
 # if there's an update available. If so, it downloads it to the other
 # partition on the Memento USB stick, then alters the MBR and partitions
 # as needed so the next reboot will boot into the newly installed partition.
@@ skipping 152 matching lines @@
 if [ "$KINSTALL_DEV" = "$INSTALL_DEV" ]; then
   log "kernel install partition the same as rootfs install partition!"
   log "  (${KINSTALL_DEV})"
   exit 1
 fi
 
 # Find whole disk device.
 ROOT_DEV=${INSTALL_DEV%%[0-9]*}
 
 # Do some device sanity checks.
-if ! expr match "$LOCAL_DEV" '^/dev/[a-z][a-z]*[12345]$' > /dev/null
+if ! expr match "$LOCAL_DEV" '^/dev/[a-z][a-z]*[123458]$' > /dev/null
 then
   log "didnt find good local device. local: $LOCAL_DEV install: $INSTALL_DEV"
   exit 1
 fi
-if ! expr match "$INSTALL_DEV" '^/dev/[a-z][a-z]*[12345]$' > /dev/null
+if ! expr match "$INSTALL_DEV" '^/dev/[a-z][a-z]*[123458]$' > /dev/null
 then
   log "didnt find good install device. local: $LOCAL_DEV install: $INSTALL_DEV"
   exit 1
 fi
 if [ "$LOCAL_DEV" == "$INSTALL_DEV" ]
 then
   log local and installation device are the same: "$LOCAL_DEV"
   exit 1
 fi
 
@@ skipping 150 matching lines @@
 abort_update_if_cmd_failed
 
 if [ -z "${FLAGS_dst_partition}" ]; then
   # mark update as complete so we don't try to update again
   touch "$UPDATED_COMPLETED_FILE"
 fi
 
 # tell user to reboot
 log Autoupdate applied. You should now reboot
 echo UPDATED