buildroot

ejabberd: bump to version 17.04

There are new dependencies: erlang-p1-jiffy, erlang-p1-oauth2,
erlang-p1-stun, erlang-p1-tls, erlang-p1-utils, erlang-p1-xmpp

as well as two host dependencies on erlang-p1-utils and
erlang-p1-xmpp. Otherwise the compilation via rebar fails.

4 patches have been refreshed and a new patch have been introduced to
tell rebar to use host dependencies instead of trying to download them.
Hopefully this patch could be drop in ejabberd 17.06. Missing SoB in
patches have been added as well.

Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>