net-im/qxmpp: Update to 1.7.0
Add the GSTREAMER option to enable audio/video support over Jingle. Non-
default locally FTTB as this is a non-default upstream option and I'm not
entirely sure if it would make a difference in qxmpp's singular consumer
net-im/kaidan. Input from kaidan users to kde@ would be appreciated in
this regard.
Fix up my screwy implementation the TEST option, especially for the qt5
flavor in cca8f3b4d4cc0fdd50e515492bf26ea36a69b339. Most normal users
don't run the regression tests and the rest problably already have
devel/qt5-testlib installed anyways, but it was still very wrong.