bitbake: Correctly route events from the worker to the server

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/runqueue.py

@@ -1467,5 +1467,5 @@ class runQueuePipe():
         while self.read():
             continue
         if len(self.queue) > 0:
-            print("Warning, worker left partial message")
+            print("Warning, worker left partial message: %s" % self.queue)
         self.fd.close()