bitbake: fix setscene task start/failure handling

* When a setscene task starts, print out that it's starting in the UI
  (ensuring we get the correct task name)
* When a setscene task fails, ensure we remove it from the list of
  running tasks so that if you break out any time afterwards it
  is not still listed.

(Bitbake rev: e8a3499c95a6d4f2b8fed002fb9504733c5be3c6)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/knotty.py

@@ -238,6 +238,10 @@ def main(server, eventHandler):
                         logger.error("%s", reason)
                 continue
 
+            if isinstance(event, bb.runqueue.sceneQueueTaskStarted):
+                logger.info("Running setscene task %d of %d (%s)" % (event.stats.completed + event.stats.active + event.stats.failed + 1, event.stats.total, event.taskstring))
+                continue
+
             if isinstance(event, bb.runqueue.runQueueTaskStarted):
                 if event.noexec:
                     tasktype = 'noexec task'
@@ -256,6 +260,11 @@ def main(server, eventHandler):
                              event.taskid, event.taskstring, event.exitcode)
                 continue
 
+            if isinstance(event, bb.runqueue.sceneQueueTaskFailed):
+                logger.warn("Setscene task %s (%s) failed with exit code '%s' - real task will be run instead",
+                             event.taskid, event.taskstring, event.exitcode)
+                continue
+
             # ignore
             if isinstance(event, (bb.event.BuildBase,
                                   bb.event.StampUpdate,