bitbake: command/runqueue: Fix shutdown logic

If you hit Ctrl+C at the right point, the system processes the request
but merrily continues building. It turns out finish_runqueue() is called
but this doesn't stop the later generation and execution of the
runqueue.

This patch adjusts some of the conditionals to ensure the build really
does stop.

(Bitbake rev: 39b08c604ba713100e174c136f81f18eca6ef33d)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/runqueue.py

@@ -1065,7 +1065,7 @@ class RunQueue:
         if self.state is runQueueCleanUp:
            self.rqexe.finish()
 
-        if self.state is runQueueComplete or self.state is runQueueFailed:
+        if (self.state is runQueueComplete or self.state is runQueueFailed) and self.rqexe:
             self.teardown_workers()
             if self.rqexe.stats.failed:
                 logger.info("Tasks Summary: Attempted %d tasks of which %d didn't need to be rerun and %d failed.", self.rqexe.stats.completed + self.rqexe.stats.failed, self.rqexe.stats.skipped, self.rqexe.stats.failed)
@@ -1106,6 +1106,7 @@ class RunQueue:
 
     def finish_runqueue(self, now = False):
         if not self.rqexe:
+            self.state = runQueueComplete
             return
 
         if now: