archivers/libarchive: Update to 3.7.9
Previous version 3.7.8 fixed following CVEs:
CVE-2024-57970, CVE-2025-1632, CVE-2025-25724
Changelog(s):
https://github.com/libarchive/libarchive/releases/tag/v3.7.9
https://github.com/libarchive/libarchive/releases/tag/v3.7.8
PR: 285592
Reviewed by: glewis (maintainer)