lz4: Update our internal copy to release r128

lz4: Update our internal copy to release r128

Looking through the git log it is unclear which release we used before as nobody
stated it there. :/ We updated after the security issues last year so my best
guess is that we have something like r119.

To see what changed I now included the NEWS file and also the LICENSE file from
upstream. Upstream in now hosted here: https://github.com/Cyan4973/lz4 and
http://www.lz4.info

I recommend STRONGLY that you check if your distro ships liblz4 as an up to
date library package and use the --enable-liblz4 configure option to use the
system version. I consider making the system version default for upcoming
releases and only carry the internal one as fallback for systems that do not
provide it.

Fix T2374