cros mod_image_for_factory: don't enable update engine for factory test images (TBR, ToT to factory)

mod_for_factory_scripts/200patchInitScript

 #!/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.
 
 echo "Applying patch to init scripts."
 
 touch "${ROOT_FS_DIR}/root/.factory_test"
 
@@ skipping 55 matching lines @@
 
 start on started factory
 stop on starting halt or starting reboot
 
 respawn
 script
 tail -n 48 -F /var/log/factory.log >/dev/tty3
 end script
 EOF
 
+if [ -r "${ROOT_FS_DIR}/etc/init/update-engine.conf" ]; then
+  patch -d "${ROOT_FS_DIR}" -Np1 <<EOF
+diff -Na -U 0 old/etc/init/update-engine.conf new/etc/init/
+--- old/etc/init/update-engine.conf     2010-08-05 16:32:55.000000000 -0700
++++ new/etc/init/update-engine.conf     2010-08-05 16:32:45.000000000 -0700
+@@ -8 +8 @@
+-start on starting system-services and started dbus
++start on never
+EOF
+fi
+
 if [ -r "${ROOT_FS_DIR}/etc/init/chrontel.conf" ]; then
   patch -d "${ROOT_FS_DIR}" -Np1 <<EOF
 diff -Nau old/etc/init/chrontel.conf new/etc/init/
 --- old/etc/init/chrontel.conf  2010-08-05 16:32:55.000000000 -0700
 +++ new/etc/init/chrontel.conf  2010-08-05 16:32:45.000000000 -0700
 @@ -7 +7 @@
 -start on started udev
 +start on never
 EOF
 fi
 
 if [ -r "${ROOT_FS_DIR}/etc/init/nvrm.conf" ]; then
   patch -d "${ROOT_FS_DIR}" -Np1 << EOF
 --- old/etc/init/nvrm.conf      2010-11-19 14:57:16.000000000 -0800
 +++ new/etc/init/nvrm.conf      2010-11-19 16:52:48.000000000 -0800
 @@ -2,7 +2,7 @@
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
 -start on starting ui
 +start on starting factory
  
  respawn
  
 EOF
 fi