Log Message:
afl: update to 2.52b.

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Version 2.52b (2017-11-04):
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  - Upgraded QEMU patches from 2.3.0 to 2.10.0. Required troubleshooting
    several weird issues. All the legwork done by Andrew Griffiths.

  - Added setsid to afl-showmap. See the notes for 2.51b.

  - Added target mode (deferred, persistent, qemu, etc) to fuzzer_stats.
    Requested by Jakub Wilk.

  - afl-tmin should now save a partially minimized file when Ctrl-C
    is pressed. Suggested by Jakub Wilk.

  - Added an option for afl-analyze to dump offsets in hex. Suggested by
    Jakub Wilk.

  - Added support for parameters in triage_crashes.sh. Patch by Adam of
    DC949.