Build 571 relink materials. Both core and launcher objects are from this candidate. Run python relink.py --ffmpeg <path-to-compatible-ffmpeg-win64> --toolchain <ucrt64-bin>. Source, build instructions and LGPL notices are included separately. linkLibs.rsp and objects1.rsp preserve the real library/object order. FFmpeg libraries are intentionally supplied as source, not duplicated here. No restriction on modification or relinking is added.
