git: 3f709e42e3be..da440030e2c6 - vendor/llvm-project/main - vendor branch updated

From: Dimitry Andric <dim_at_FreeBSD.org>
Date: Sun, 07 Dec 2025 18:30:07 UTC
The branch vendor/llvm-project/main has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=3f709e42e3be..da440030e2c6

da440030e2c6 Adjust vendor import of llvm-project main llvmorg-21-init-19288-gface93e724f4: add partial third-party/ top-level directory.