[sys-auth/polkit-qt] Sync with portage.

Package-Manager: portage-2.2.10
[sys-auth/polkit-qt] CMake automoc is now used.

Package-Manager: portage-2.2.10
[Documentation] Don't automatically pin Plasma 5 packages to a SLOT.

In order to avoid keywords/mask files accidentally applying to KDE 4 stuff, we
will specify the SLOT manually in the versioned set which will then carry over
automatically to the unversioned, generated set.
[sets] Pin kde-plasma-5.0 to SLOT 5.
[Documentation] Regenerate kde-plasma-5.0