sched: /debug/sched_features

provide a text based interface to the scheduler features; this saves the
'user' from setting bits using decimal arithmetic.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --cc kernel/sched.c
Simple merge

diff --cc kernel/sched_features.h
Simple merge