add MULTICORE_TASK_PRIORITY option (default=true) to give prority to multi-core task. refactor deq_local, deq_remote, deq_steal.
add MULTICORE_TASK_PRIORITY option (default=true) to give prority to multi-core task.
refactor deq_local, deq_remote, deq_steal.

masa16/pwrake2,masa16/pwrake