Deadlock in kded whith Qt 5.6

[Ralf Habacker]

Am 21.01.2016 um 08:37 schrieb David Faure:

>  
> With this patch applied, here's one log for the first call (autostart+autoload, doesn't work)
>
> http://www.davidfaure.fr/2016/first_call.txt
>
> and one log for the second call (kded already started, autoload works)
>
> http://www.davidfaure.fr/2016/second_call.txt
>
This patches https://codereview.qt-project.org/#/c/146767/1 and 
https://codereview.qt-project.org/#/c/146768/, which prints out message
'serial' and 'reply serial to' on qdbus side, may help to understand the
message flow more easier.

Ralf