cgroup: trivial style updates

* Place newline before function opening brace in cgroup_kill_sb().

* Insert space before assignment in attach_task_by_pid()

tj: merged two patches into one.

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
1 file changed