Log Message:
This is an ugly hack:

qdbuscpp2xml and qdbusxml2cpp should be built and installed, because
they are referenced from Qt5DBusConfigExtras.cmake, and cmake
fails to find qtdbus if they are not installed.
I didn't manage to build them though, and the only customers so far
didn't need their functionality - so install scripts that call 'false'.

Bump PKGREVISION.

Please fix properly :)