sched/tracing: Print task status in sched_migrate_task

A task can migrate either while it is waking or while it
is running via load balancer. Print the task status
i.e running or not in sched_migrate_task. This helps in
counting the different types of migrations without relying
on other trace events.

Change-Id: Ib473f9ccdc78003bb1f5d2dc24354f2db7a684f5
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>