git: b385e49173e1..ac2d088aae92 - vendor/atf - vendor branch updated

From: Enji Cooper <ngie_at_FreeBSD.org>
Date: Mon, 21 Sep 2026 00:47:01 UTC
The branch vendor/atf has been updated by ngie:

URL: https://cgit.FreeBSD.org/src/log/?id=b385e49173e1..ac2d088aae92

ac2d088aae92 atf: import atf-0.26-rc1