tweaks iosched for better android performance
disable GENTLE FAIR SLEEPERS
Sleeper Fairness is a concept used by CFS which treat sleeping/waiting tasks as if they were in a run queue. This implies tasks which spend most of the time waiting for an user input and such will get a fair share of CPU when they need it. Disabling Gentle Fair Sleepers could improve UI responsiveness.
rtc: alarm: Update hrtimer if alarm at the head of the queue is reprogrammed

If an alarm was restarted with a value that moved it away from the head
of a queue, the hrtimer would not be updated. This would cause unnecessary
wakeups.

Change-Id: I7c6dc7e6085a1f03722b2fcb14a83987ef674917
Signed-off-by: Arve Hjønnevåg <arve@android.com>