git: da440030e2c6..e6df1a75c40c - vendor/llvm-project/main - vendor branch updated

From: Dimitry Andric <dim_at_FreeBSD.org>
Date: Tue, 09 Dec 2025 13:44:00 UTC
The branch vendor/llvm-project/main has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=da440030e2c6..e6df1a75c40c

e6df1a75c40c Adjust vendor import of llvm-project main llvmorg-21-init-19288-gface93e724f4: add partial libc/ top-level directory.