forensics-all is marked for autoremoval from testing

[Debian testing autoremoval watch]

forensics-all 1.6 is marked for autoremoval from testing on 2017-09-04

It (build-)depends on packages with these RC bugs:
853300: aff4: ftbfs with GCC-7
853374: dislocker: ftbfs with GCC-7
853438: guymager: ftbfs with GCC-7
853663: sleuthkit: ftbfs with GCC-7