updated yabause and lxdream specs

[Hans de Goede]

Julian Sikorski wrote:
> Hi,
> 
> I have noticed that the lxdream and yabause packages are not packaging
> the latest version of these emulators. Since in case of console emus you
> basically always want latest and greatest, I took some time to update
> the specs. Did not test them a lot, but they at least compile and run.
> 

Thanks!

Note I'm not the maintainer of these, still I'm going to ask this:
Maybe you want to co-maintain these ?

Regards,

Hans