Some users report that DAWN sometimes crashes after a while. Mostly
this happens after the new update has been rolled out.
Since I would not like to go back to the older version, I add as
a workaround for now that DAWN automatically respawned.
Workaround for:
https://github.com/berlin-open-wireless-lab/DAWN/issues/151
Signed-off-by: Nick Hainke <vincent@systemli.org>