This adds a special treatment for fonts which rely on the win metrics
for correct line spacing calculation.

At the moment, only 'DIN Light' is known to need that treatment.

Change-Id: Idd9fd6f63083ab7a706e0cbcd33a947d4949d4e9
Reviewed-on: https://gerrit.libreoffice.org/53962Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>