[crosutils] Propagate use_emerged flag up from run_remote_tests

bin/cros_run_vm_test

 #!/bin/bash
 
 # 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.
 #
 # Runs a given test case under a VM.
 
 . "$(dirname $0)/../common.sh"
 . "$(dirname $0)/../lib/cros_vm_lib.sh"
 . "$(dirname "$0")/../lib/cros_vm_constants.sh"
 
 MAX_RETRIES=3
 
 get_default_board
 
 DEFINE_string board "$DEFAULT_BOARD" \
-    "The board for which you built autotest."
+    "The board for which you built autotest." b
 DEFINE_string image_path "" "Full path of the VM image"
 DEFINE_string results_dir_root "" "alternate root results directory"
 DEFINE_string test_case "" "Name of the test case to run"
+DEFINE_boolean use_emerged ${FLAGS_FALSE} \
+    "Force use of emerged autotest packages"
 
 set -e
 
 # Parse command line.
 FLAGS "$@" || exit 1
 
 # Use latest if not specified.
 if [ -z "${FLAGS_image_path}" ]; then
   LATEST_IMAGE="$(${SCRIPTS_DIR}/get_latest_image.sh \
       --board=${FLAGS_board})/${DEFAULT_QEMU_IMAGE}"
   info "Using latest vm image ${LATEST_IMAGE}"
   FLAGS_image_path=${LATEST_IMAGE}
 fi
 
 [ -e "${FLAGS_image_path}" ] || die "Image ${FLAGS_image_path} does not exist."
 
 if [ -n "${FLAGS_test_case}" ]; then
   warn "Use of --test_case=<test> is being deprecated.  Just pass test names \
 as separate command line arguments."
 fi
 
 if [ -z "${FLAGS_test_case}" ] && [ -z "${FLAGS_ARGV}" ]; then
   die "You must specify a test case."
 fi
 
+USE_EMERGED=
+if [[ ${FLAGS_use_emerged} -eq ${FLAGS_TRUE} ]]; then
+  USE_EMERGED="--use_emerged"
+fi
+
 tests=( )
 [ -n "${FLAGS_test_case}" ] && tests=( "${FLAGS_test_case}" )
 for test in ${FLAGS_ARGV}; do
   tests=( "${tests[@]}" "$(remove_quotes "${test}")" )
 done
 
 trap stop_kvm EXIT
 start_kvm "${FLAGS_image_path}"
 info "Checking for ssh access to virtual machine."
 retry_until_ssh ${MAX_RETRIES}
 "$(dirname $0)"/../run_remote_tests.sh \
   --board=${FLAGS_board} \
   --ssh_port=${FLAGS_ssh_port} \
   --remote=127.0.0.1 \
   --results_dir_root="${FLAGS_results_dir_root}" \
+  ${USE_EMERGED} \
   "${tests[@]}"