Make mod_image_for_test work with default args

src/scripts/mod_image_for_test.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.
 
 # Script to modify a keyfob-based chromeos system image for testability.
 
 # Load common constants.  This should be the first executable line.
 # The path to common.sh should be relative to your script's location.
@@ skipping 18 matching lines @@
 # No board, no default and no image set then we can't find the image
 if [ -z $FLAGS_image ] && [ -z $FLAGS_board ] ; then
   setup_board_warning
   echo "*** mod_image_for_test failed.  No board set and no image set"
   exit 1
 fi
 
 # We have a board name but no image set.  Use image at default location
 if [ -z $FLAGS_image ] ; then
   IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images/${FLAGS_board}"
-  FILENAME="chromiumos_test_image.bin"
+  FILENAME="chromiumos_image.bin"
   FLAGS_image="${IMAGES_DIR}/$(ls -t $IMAGES_DIR 2>&-| head -1)/${FILENAME}"
 fi
 
 # Abort early if we can't find the image
 if [ ! -f $FLAGS_image ] ; then
   echo "No image found at $FLAGS_image"
   exit 1
 fi
 
 # Make sure anything mounted in the rootfs is cleaned up ok on exit.
@@ skipping 92 matching lines @@
       ${ROOT_FS_DIR}/usr/local/manufacturing/qualified_components
   else
     echo "No qualified component file found at: ${FLAGS_qualdb}"
     exit 1
   fi
 fi
 
 cleanup
 trap - EXIT