Show-queue now displays the time each task was added to the queue, as
'HH:mm:ss.SSS' if recent, or 'MMM-dd HH:mm' if started more than a day ago.
Sample Output:
Task State StartTime Command
------------------------------------------------------------------------------
59c06022 17:41:08.241 gerrit test-submit-rule (augale)
99da580d 18:39:53.921 17:39:53.922 Log File Compressor
------------------------------------------------------------------------------
2 tasks
Change-Id: I4f013c941d8c86c2caaeccbbf13f2a9c6bd21a67
50bc936427