Update afl to rev 53 via SR 827914
    
    https://build.opensuse.org/request/show/827914
    by user msmeissn + dimstar_suse
    - updated to 2.67c
      - Support for improved afl++ snapshot module:
        https://github.com/AFLplusplus/AFL-Snapshot-LKM
      - Due to the instrumentation needing more memory, the initial memory sizes
        for -m have been increased
      - afl-fuzz: