package/neard: bump version to 0.16

Added systemd support needed after upstream commit
https://git.kernel.org/pub/scm/network/nfc/neard.git/commit/?id=ffc849bc1c83f0c9f31cbdf9bf843cf245496183



Fixed broken link in Config.in help section.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>