Bug#745081: game-data-packager: add support for full versions of wolf3d and spear of destiny

[Alexandre Detiste]

> I just realised that the new 3D Realms Anthology has different versions of
> the WL6 files, and they work with -wl6a (and not with -wl6):

Thanks, I've added these too.

Have you got some license / copyright file shipped with your game ?

In the Steam version, there is nothing.