[clang] [clang] Exclude EmptyRecord when calculating larger CXX records (PR #205040)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

> Maybe we should consider investing in ABI fuzzing infrastructure to catch this kind of issue earlier.

Sounds doable. We can leverage GCC/MSVC as a golden sample. But I don't have any fuzzing experience. Maybe @dtcxzyw have more ideas.

https://github.com/llvm/llvm-project/pull/205040