add status to task ls
add status to task ls

Signed-off-by: Victor Vieux <ce584ac70734cfa5a848cd28039798932c7ea675@docker.com>

cezarsa/swarmkit,docker/swarmkit,deljuven/swarmkit,jlhawn/swarmkit,elifa/swarmkit,deljuven/swarmkit,cheyang/swarmkit,sungwonh/swarmkit,yp-engineering/swarmkit,vasil-yordanov/swarmkit,aaronlehmann/swarmkit,aaronlehmann/swarmkit,diogomonica/swarmkit,RenaudWasTaken/swarmkit,runshenzhu/swarmkit,allencloud/swarmkit,cheyang/swarmkit,fate-grand-order/swarmkit,AliyunContainerService/swarmkit,RenaudWasTaken/swarmkit,fate-grand-order/swarmkit,dperny/swarmkit-1,yp-engineering/swarmkit,elifa/swarmkit,yongtang/swarmkit,alyyousuf7/swarmkit,docker/swarmkit,jlhawn/swarmkit,sungwonh/swarmkit,runshenzhu/swarmkit,dperny/swarmkit-1,AliyunContainerService/swarmkit,vasil-yordanov/swarmkit,Noyan759/swarmkit,allencloud/swarmkit,cezarsa/swarmkit,Noyan759/swarmkit,diogomonica/swarmkit,alyyousuf7/swarmkit,yongtang/swarmkit