libconnman-qt: update to 1.0.50+git80ac184

Allows to install versions for Qt4/X11 and Qt4/Embedded into
the same filesystem by overriding the target name.

This version also removes a superflous .pc file from ${libdir}.

Signed-off-by: Andreas Oberritter <obi@opendreambox.org>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>