sched: cleanup: Rename 'out_unlock' to 'out_free_new_mask'

Nothing is locked there, so label's name only confuses a reader.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140922183630.11015.59500.stgit@localhost


Signed-off-by: Ingo Molnar <mingo@kernel.org>