Update factory installer, factory test

src/platform/installer/chromeos-setimage

 #!/bin/sh -u
 # Copyright (c) 2010 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.
 #
 # A script to display or change the preferred image
 
 # Load functions and constants for chromeos-install.
 . "$(dirname "$0")/chromeos-common.sh" || exit 1
 . /usr/lib/shflags || exit 1
@@ skipping 30 matching lines @@
 # Don't run this as root
 dont_run_as_root
 
 # Check out the dst device.
 if [ ! -b "$FLAGS_dst" ]
 then
   echo "Error: Unable to find block device: $FLAGS_dst"
   exit 1
 fi
 
-
 # Mount the EFI System Partition
 mountpoint=$(mktemp -d  /tmp/mountesp_XXXXXXXXX)
 tempfile=$(mktemp /tmp/grubcfg_XXXXXXXXX)
 sudo mount ${FLAGS_dst}12 ${mountpoint}
 
 # Make the change
 if [ -n "${newimg:-}" ]; then
-  sed -e "s/^set default=.*/set default=$newimg/" \
+  echo "Update boot default to menu item $newimg"
+  sed -e "s/^set default=.*/set default=${newimg}/" \
     ${mountpoint}/efi/boot/grub.cfg > ${tempfile}
   sudo cp ${tempfile} ${mountpoint}/efi/boot/grub.cfg
 fi
 
+echo "Current boot default is:"
 # Print the [new] default choice
 grep -qs '^set default=0' ${mountpoint}/efi/boot/grub.cfg && echo "A"
 grep -qs '^set default=1' ${mountpoint}/efi/boot/grub.cfg && echo "B"
 
 # Clean up
 sudo umount ${mountpoint}
 rm -f ${tempfile}
 rmdir ${mountpoint}