Allow powerm to read prefs from /var/lib/power_manager

powerm.conf

 # 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.
 
 description   "Start powerm after dbus has started"
 author        "chromium-os-dev@chromium.org"
 
 start on started dbus
 stop on starting halt or starting reboot
 
 env LOG_DIR=/var/log/power_manager
 env RUN_DIR=/var/run/power_manager
+env PREFS_DIR=/var/lib/power_manager
 
 respawn
 respawn limit 20 60  # if the job respawns 20 times in 60 seconds, stop trying.
 
 script
 
 mkdir -p ${LOG_DIR} ${RUN_DIR}
 # powerd will create files here as well
 chmod a+w ${RUN_DIR}
 exec /usr/bin/powerm                                                      \
+    --prefs_dir=${PREFS_DIR}                                              \
     --log_dir=${LOG_DIR}                                                  \
     --run_dir=${RUN_DIR}                                                  \
   > ${LOG_DIR}/powerm.out 2>&1
 
 end script