git: 08e8dd7b9db7..677727e8296a - vendor/llvm-project/release-15.x - vendor branch updated

From: Dimitry Andric <dim_at_FreeBSD.org>
Date: Sat, 13 Aug 2022 12:29:09 UTC
The branch vendor/llvm-project/release-15.x has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=08e8dd7b9db7..677727e8296a

677727e8296a Vendor import of llvm-project branch release/15.x llvmorg-15.0.0-rc2-40-gfbd2950d8d0d.