- Fix build for Leap 15.3
* add build dependency for librsvg-2.0 (was not discovered by pkgconfig)
* Add patch: 0001-Don-t-generate-appstream-meta-data-on-older-versions.patch
just used for Leap. Disable appdata.xml generation since we have to old
version of appstream
* add uk lang folder for man pages (different from Factory)
* add com.gexperts.Tilix.appdata.xml file for Leap since we can't generate it