Update afl to version 4.20c / rev 82 via SR 1167802
    
    https://build.opensuse.org/request/show/1167802
    by user msmeissn + anag+factory
    - updated to 4.20c
      + A new forkserver communication model is now introduced. afl-fuzz is
        backward compatible to old compiled targets if they are not built
        for CMPLOG/Redqueen, but new compiled targets will not work with
        old afl-fuzz versions!
      + Recompile all targets that are instrumented for CMPLOG/Redqueen!
      - AFL++ now supports up to 4 billion coverage edges, up from 6 million.
      - New compile option: `make PERFORMANCE=1` - this will enable special
        CPU dependent optimizations that make everything more performant - but
        the binaries will likely won't work on different platforms. Also
        enables a faster hasher if the CPU requirements are met.
      - The persistent record feature (see config.h) was expanded to also
        support replay, thanks to @quarta-qti !
      - afl-fu