graphics/radiance: Update 0.6.1 -> 0.6.1.20200216; Unbreak; Add the PORTSCOUT tag

mpv removed the header qthelper.hpp and they now recommend to copy it
into project's source. This is done by this unbreak.

mpv-based code fails to initialize OpenGL, at least on my computer,
so mpv throws an exception.
Testcase: https://github.com/mpv-player/mpv/issues/9319