No need to deduce kernel version again,
just save it in a temporary file.

The main reason to change what worked is
that e2k kernel-image package has Linux bits
named as image-$kver and not vmlinuz-$kver;
the guessing logic taking all of this into
account resulted in non-aesthetic patch.

NB: there's a duplicating script within
    kernel feature; it wasn't easy to avoid
    this and it might differ when handling
    multiple kernels, I didn't think much
    about this now as vm images tend to ship
    with the sole one.