[clang] [llvm] [LLVMABI][AARCH64] Handle condtions for ignoring empty types (PR #224476)

[Peter Smith via cfe-commits]

https://github.com/smithp35 commented:

I can't spot anything that differs from existing clang behaviour. It looks like clang and GCC may disagree on whether a C++ Empty type needs a return value. Not sure if there is anything that can be done here. If I'm right it may be worth leaving a comment to note the difference.

https://github.com/llvm/llvm-project/pull/224476