Removed workaround for avcodec use flag disabled.

It is not needed anymore starting with version 2.2

Package-Manager: portage-2.2.8-r2
Add missing qtx11extras dependency for Qt5.

Fixes 525004 and unreported issue that VLC opens separate window for movie when Qt5 X11 Extras are not found by configure script.

Although it is possible to use Qt5 with Wayland instead of X11, it is not well supported by VLC, yet (WiP). Ebuild does not support wayland output, yet.

Package-Manager: portage-2.2.8-r2