rpi-userland: update to 20191218
rpi-userland: update to 20191218

The conflict between rpi-userland pkgconfig files egl.pc and glesv2.pc
and the MesaLib provided files was solved upstream: they simply removed
the files from the installation.
https://github.com/raspberrypi/userland/commit/5070cb7fc150fc98f1ed64a7739c3356970d9f76

Closes: #18299

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages