!hurd-any for dependencies not available in debian hurd (libva,libv4l)
recommend libgl1-mesa-dri and suggest libaacs0
Better changelog hack in separate script called from ./update.

dpkg-buildpackage reads the changelog before ever calling
debian/rules, so its not a good idea to change it from there. Move
this to a separate script called from ./update which does not depend
on any debian-specific commands.
recommend video acceleration libraries