Draft: os: Add Solus
This PR adds the Linux distro "Solus". So far I've only included the latest release, version 4.4. Solus has a rolling release model, so I'm not sure adding older versions would be of much use (but I can certainly do it if preferable). Also the volume-id for Solus releases isn't versioned, so that would lead to conflicts in the isodata tests (unless there is a workaround?)
Signed-off-by: Thomas Staudinger Staudi.Kaos@gmail.com