Snippets for llvm 22.1.8 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/llvm/22.1.8/26.fc46/data/logs/s390x/build.log.

• /builddir/build/BUILD/llvm-22.1.8-build/llvm-project-22.1.8.src/llvm/lib/Support/BLAKE3/blake3.c:365:10: warning: unused variable 'num_cvs' [-Wunused-variable]
    365 |   size_t num_cvs = blake3_compress_subtree_wide(input, input_len, key,
        |          ^~~~~~~