Michael Straube authored Feb 14, 2017 and Lukas Fleischer committed Feb 14, 2017

All error messages in aurjson except two end with a period. Add the
missing periods to make the messages consistent.

Signed-off-by: Michael Straube <straubem@gmx.de>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>