[llvm] [TargetParser] Recognize legacy GNU/Hurd triples (PR #214765)

[Bhupesh Cholake via llvm-commits]

RealBhupesh wrote:

Thanks for the guidance. I have read the LLVM AI Tool Use Policy, the Code-Review Policy and Practices, and the Developer Policy.

I confirm that I reviewed the implementation, regression tests, and validation as the human contributor before requesting review and that I take responsibility for this contribution. The PR description discloses the use of OpenAI Codex, and the commit includes the `Assisted-by: OpenAI Codex` trailer.

https://github.com/llvm/llvm-project/pull/214765