add pyqt5

pyqt5 require latest sip to build.
[1] I can only get pyqt4 build with sip-4.16.1 by using configure-ng.py, 
[2] then pykde4 won't work.

[1 ]https://aur.archlinux.org/packages/pyqt4dev/
[2] https://bugs.kde.org/show_bug.cgi?id=327633