libqt5-qtbase:
- omit journald logging
- omit examples
- omit sql database drivers (except sqlite)

libqt5-qtmultimedia:
- omit gstreamer support
- omit openal support

libqt5-qtwebkit:
- omit gstreamer support

python-qt5:
- only build QtCore, QtGui, QtWidgets, QtMultimedia, QtSvg