It's hard to find an application that can display these file types
on Linux, so suggest LO for those.

Change-Id: I9b32b4ee2057e82a13b8fc95478f2bc2cf7ffca5
Reviewed-on: https://gerrit.libreoffice.org/63372
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>