[clang] [llvm] [clang][SYCL] Add -fno-sycl-rdc to finalize device code per translation unit (PR #218089)

[Tom Honermann via cfe-commits]

https://github.com/tahonermann commented:

Looks good to me. I added a couple of minor comments that you should feel free to ignore if you prefer the code as is.

https://github.com/llvm/llvm-project/pull/218089