git: 458532c2dd24..b9a7e2c7438a - vendor/llvm-project/release-15.x - vendor branch updated

From: Dimitry Andric <dim_at_FreeBSD.org>
Date: Sat, 14 Jan 2023 13:55:30 UTC
The branch vendor/llvm-project/release-15.x has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=458532c2dd24..b9a7e2c7438a

b9a7e2c7438a Vendor import of llvm-project branch release/15.x llvmorg-15.0.7-0-g8dfdcc7b7bf6.