bitbake/knotty: ensure CommandFailed increases error count

CommandFailed already sets the return code, so we print out the error
summary message, however we don't increase the error count so it is
usually zero in this case. As we are actually showing an ERROR message,
increment the error count so that the summary makes sense.

(Bitbake rev: aeb71c3ca65dc42015c29c0e4cac050bfbcb51a5)

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

@@ -203,6 +203,7 @@ def main(server, eventHandler):
 
             if isinstance(event, bb.command.CommandFailed):
                 return_value = event.exitcode
+                errors = errors + 1
                 logger.error("Command execution failed: %s", event.error)
                 shutdown = 2
                 continue