git: b0ea71a8555c..76141d3306de - vendor/libarchive - vendor branch updated

[Martin Matuska]

The branch vendor/libarchive has been updated by mm:

URL: https://cgit.FreeBSD.org/src/log/?id=b0ea71a8555c..76141d3306de

76141d3306de Update vendor/libarchive to 3.8.1