Merge "build_image: remove an unnecessary call to append2simg"

    return False

  return True

def Append(target, file_to_append, error_message):

  cmd = 'cat %s >> %s' % (file_to_append, target)

  print cmd

  status, output = commands.getstatusoutput(cmd)

  if status:

    print "%s: %s" % (error_message, output)

    return False

  return True

def BuildVerifiedImage(data_image_path, verity_image_path,

                       verity_metadata_path):

  if not Append2Simg(data_image_path, verity_image_path,

                     "Could not append verity tree!"):

    return False

  if not Append2Simg(data_image_path, verity_metadata_path,

  if not Append(verity_image_path, verity_metadata_path,

                "Could not append verity metadata!"):

    return False

  if not Append2Simg(data_image_path, verity_image_path,

                     "Could not append verity data!"):

    return False

  return True

def UnsparseImage(sparse_image_path, replace=True):