[clang] [Clang] Add C++11/C23-style spellings for Swift import attributes (PR #183484)

[Tshaka Lekholoane via cfe-commits]

tshakalekholoane wrote:

> Yeah, I'd say add the FIXME comments with the summary of the discussion here, thank you!

Done, @AaronBallman.


https://github.com/llvm/llvm-project/pull/183484