[lld] [ELF] Support NVPTX bitcode in LTO output modes (PR #200679)

[Manuel Drehwald via llvm-commits]

ZuseZ4 wrote:

ping @MaskRay (also for https://github.com/llvm/llvm-project/pull/200678).
It would be great if we could just use lld for both gpu targets, is there a chance you could have a look at this PR and the other one linked? It would simplify our Rust distribution and simplify some further work if we just had one linker.

https://github.com/llvm/llvm-project/pull/200679