[worker] Always sleep a bit so the worker gets killed when send a signal.
[worker] Always sleep a bit so the worker gets killed when send a signal.

k0nserv/trunk.cocoapods.org,k0nserv/trunk.cocoapods.org,CocoaPods/trunk.cocoapods.org,CocoaPods/trunk.cocoapods.org,Shawn-WangDapeng/trunk.cocoapods.org,k0nserv/trunk.cocoapods.org,billinghamj/trunk.cocoapods.org,Shawn-WangDapeng/trunk.cocoapods.org,billinghamj/trunk.cocoapods.org