meson: use relative paths in megadriver symlinks
e.g. libvdpau_radeonsi.so(.1(.0)) were pointing to the absolute build-time path of libvdpau_radeonsi.so.1.0.0, which caused trouble when packaging the libraries.
Continuing from mail:
I think that driver is wrong here, I think that this should be
I'm not seeing anything named
each in the script…