qtbase: Allow to build without any QPA backend

When disabling fb, directfb, x11, widgets and OpenGL qtbase will
still complain that no QPA backend is available. Always add the
-no-qpa-platform-guard parameter
tufao: Add the tufao http server implementation

Add a patch to hardcode some paths as otherwise it tries to install
files into the directories of cmake-native and qmake-native
libsystemd-qt: Add latest git version of systemd bindings
cmake: Be able to use this layer with Dora
qtbase: Hacks to shrink qtbase

This can be done more properly in our conf/local.conf but I am
very lazy and do it this way. :}
libsystemd-qt: Add new API for systemd