Log Message:
Update sysutils/testdisk to testdisk-7.0.

Changes:
== 7.0 ==
=== General Improvements ===
Various fix including security fix, thanks to
* Coverity scan (Static Analysis of source code)
* afl-fuzz (security-oriented fuzzer).
* Denis Andzakovic from Security Assessment for reporting an
  exploitable Stack Buffer Overflow

=== TestDisk ===
==== Improvements ====
* exFAT: better support
* ext4: handle 64 bit blocks or 64 KiB blocksize. Fix detection and file
  listing

==== Bug fixes ====
* Avoid erroneous error when writing 512 bytes on hard disk using 4k sector
* FAT, NTFS: avoid NULL pointer dereference if localtime() returns NULL.
  Thanks to Graham Sutherland for reporting this bug.

=== PhotoRec & QPhotoRec ===
QPhotoRec is a Graphical User Interface (Qt based GUI) version of PhotoRec.
More user friendly, it recognizes the same file formats.

PhotoRec remains recommended for advanced users, it can stop a recovery and
resume it later, it recovers more fragmented files when brute-force technology
is enabled and expert mode is available.

==== Improvements ====
* Reduced false positives for more than 80 file formats.
* .gif: fix filesize detection
* .flv: add Flash filesize detection
* .mpg: detect filesize for MPEG
* .ra: detect filesize for RealAudio3
* Improved algorithm to deal with data fragmentation resulting in a general
  speed increased
* Speedup brute-force mode. Brute-force mode can recover more fragmented
  files, but it's still slow and not 100% reliable. You can enable it in
  PhotoRec Options menu.

New file formats recovered by PhotoRec:
* .3dm: Rhino / openNURBS
* .ari: ARRI Raw Video
* .camrec: Camtasia Studio
* .dad: Micae DVR
* .dcm: Digital Imaging and Communications in Medicine (DICOM)
* .fp12: File Maker Pro 12
* .kra: Krita
* .mlv: Magic Lantern Video
* .notebook: SMART notebook
* .ora: Mypaint
* .red: RED2 video format
* .rlv: Revelation password
* .vbm: Veeam Backup Metadata
* .woff: Web Open Font Format