init.flo.rc: Enable frequency synchronization on thread migration

Setting the cpu.notify_on_migrate node in sysfs, so that on a thread
migration of a task belonging 'apps' cgroup, the destination core's
frequency is synchronized to the source core's frequency.

Change-Id: If7754196e71f7e607f901b0a989fa2d1c3bb31da
diff --git a/init.flo.rc b/init.flo.rc
index d905826..52dd454 100644
--- a/init.flo.rc
+++ b/init.flo.rc
@@ -230,6 +230,7 @@
     write /sys/devices/system/cpu/cpu1/online 1
     write /sys/devices/system/cpu/cpu2/online 1
     write /sys/devices/system/cpu/cpu3/online 1
+    write /dev/cpuctl/apps/cpu.notify_on_migrate 1
 
 on charger
     # Enable Power modes and set the CPU Freq Sampling rates