Bug#855370: dracut-core: Check installation path of aufs-dkms in module-setup.sh

[Thomas Lange]

    > I forgot to note that the aufs-module can be found in the package
    > aufs-dkms (source: aufs) in Debian stretch+.
I thought aufs was replaced by overlayfs. But you are right, there's
still aufs in the dkms package.

-- 
regards Thomas