libtracker-miner: Improve docs for tracker_miner_manager_pause_for_process()
libtracker-miner: Improve docs for tracker_miner_manager_pause_for_process()

When finalizing the manager, it will resume the pause. The tracker-control
utility was demonstrating this. Let people calling it know.

hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker