MAINTAINERS/sched: Update scheduler file pattern

MAINTAINERS/sched: Update scheduler file pattern

The commit 391e43da797a ("sched: Move all scheduler bits into
kernel/sched/") moved all scheduler codes to the kernel/sched/
directory, but missed the MAINTAINERS. Since it still expects
files from kernel/ directory, get_maintainer script has to rely
on the git (log) fallback mechanism.

 $ scripts/get_maintainer.pl -f kernel/sched/core.c --nogit-fallback
 linux-kernel@vger.kernel.org (open list)

With this patch:

 $ scripts/get_maintainer.pl -f kernel/sched/core.c --nogit-fallback
 Ingo Molnar <mingo@redhat.com> (maintainer:SCHEDULER)
 Peter Zijlstra <peterz@infradead.org> (maintainer:SCHEDULER)
 linux-kernel@vger.kernel.org (open list)

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1341326251-4140-1-git-send-email-namhyung@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>