git: 1f917f69ff07..4b4fe385e49b - vendor/llvm-project/main - vendor branch updated

[Dimitry Andric]

The branch vendor/llvm-project/main has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=1f917f69ff07..4b4fe385e49b

4b4fe385e49b Vendor import of llvm-project main 
llvmorg-15-init-17485-ga3e38b4a206b.