Update afl to rev 50 via SR 795494
    
    https://build.opensuse.org/request/show/795494
    by user msmeissn + dimstar_suse
    - updated to 2.64c
      - llvm_mode LTO mode:
        - now requires llvm11 - but compiles all targets! :)
        - autodictionary feature added, enable with `AFL_LLVM_LTO_AUTODICTIONARY`
        - variable map size usage
      - afl-fuzz:
        - variable map size support added (only LTO mode can use this)
        - snapshot feature usage now visible in UI
        - Now setting `-L -1` will enable MOpt in parallel to normal mutation.
          Additionally, this allows to run dictionaries, radamsa and cmplog.
        - fix for cmplog/redqueen mode if stdin was used
        - fix for writing a better plot_data file
      - qemu_mode: fix for persistent mode (which would not terminate or get stuck)
      - compare-transform/AFL_LLVM_LAF_TRANSFORM_COMPARES now transforms also
        static global and local variable comparisons (cannot find al