The system packages in the base template were
updated via apt-get on 12.07.2017.

We hoped that it will solve mysterious problem of
a network interface being randomly disabled. Sadly
we had no luck, but getting all security updates
also make sense.

Change-Id: I34d7a56a2c5530376f74bb35faf461e2e18da14a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>