git: 6c0d5e8e0e5f..84631082f67b - vendor/libarchive - vendor branch updated

From: Martin Matuska <mm_at_FreeBSD.org>
Date: Wed, 09 Feb 2022 13:21:07 UTC
The branch vendor/libarchive has been updated by mm:

URL: https://cgit.FreeBSD.org/src/log/?id=6c0d5e8e0e5f..84631082f67b

84631082f67b Update vendor/libarchive libarchive/libarchive@9147def1d