Add "wine-staging-compat" to possible dependency on package

[IvanDSM]

dssi-vst packages from the KXStudio repository (as well as the carla-bridge-wine32:i386 package) will not update if wine-staging is installed instead of normal wine. This leads to broken functionality, with the VSTs randomly crashing on startup. The solution to this is to add "wine-staging-compat" to the list of alternatives to the "wine" package. The "wine-staging-compat" does symlinks to ensure wine-staging is used by other packages, as well as the user as a normal wine build with no need for extra configuration.