Fix library versioning
The current things leads to weirdness like
libPulseAudioQt.so -> libPulseAudioQt.so.4 -> libPulseAudioQt.so.1.4.0
which is wrong and unhelpful.
The current things leads to weirdness like
libPulseAudioQt.so -> libPulseAudioQt.so.4 -> libPulseAudioQt.so.1.4.0
which is wrong and unhelpful.