[llvm] [llvm-rc] Handle Windows line endings in tag-html test (PR #113000)

[via llvm-commits]

ldrumm wrote:

Thanks for the fix! I agree that ideally we shouldn't have to perform shenanigans for each test, but if this cleans up my mess, then I think we should merge it

https://github.com/llvm/llvm-project/pull/113000