wlvncc: wayland vnc client

The package depends on gbm which is not supported for seco-mx6-fsl
machine. See commit 4420f4fa ("qtbase: Remove gbm packageconfig_distro
option for seco-mx6-fsl machine").

Also the package depends on libavcodec provided by ffmpeg. It requires
to accept the commercial license. The following line should be added to
local.conf:
LICENSE_FLAGS_ACCEPTED = "commercial_ffmpeg"