git: 8a37c71e9d88..86321b98854d - vendor/llvm-project/release-16.x - vendor branch updated

From: Dimitry Andric <dim_at_FreeBSD.org>
Date: Sat, 22 Apr 2023 13:39:07 UTC
The branch vendor/llvm-project/release-16.x has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=8a37c71e9d88..86321b98854d

86321b98854d Vendor import of llvm-project branch release/16.x llvmorg-16.0.2-0-g18ddebe1a1a9 (aka 16.0.2 release).