[clang] [llvm] Triple::normalize: Use none as OS for XX-none-ABI (PR #89638)

[Peter Waller via llvm-commits]

https://github.com/peterwaller-arm approved this pull request.

LGTM, thanks for supplying a quick fix and iterating this, and thanks for waiting for input on the RFC.

https://github.com/llvm/llvm-project/pull/89638