[llvm] [AArch64] Fix return address auth in tail call epilogues (PR #189484)

[Jon Roelofs via llvm-commits]

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jroelofs wrote:

It's not swift-specific, though that is the most obvious place you would see this on darwin platforms. I'll adjust the other test to use `tailcc` so we get a bit of coverage for both.

https://github.com/llvm/llvm-project/pull/189484