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

[Dimitry Andric]

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.