[clang] [Clang][TableGen] Support specifying address space in clang builtin prototypes (PR #108497)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Sorry for missing this, it was in Draft status and so I wasn't looking at it for reviews. :-)

This is sort of heading in the direction I think it should go. I did have a suggestion though. 

https://github.com/llvm/llvm-project/pull/108497