sched: make posix-cpu-timers use CFS's accounting information

update the posix-cpu-timers code to use CFS's CPU accounting information.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --cc include/linux/sched.h
Simple merge

diff --cc kernel/posix-cpu-timers.c
Simple merge

diff --cc kernel/sched.c
Simple merge