[llvm] [NVPTX] Add ELF flags for Nvidia cubin files (PR #75624)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> LGTM
> 
> > This will be used in the offloading runtime in the future.
> 
> This is the first I'm learning about this; what is it?

It's the OpenMP offloading runtime, the one under `openmp`. There's currently some discussions about moving it around and making it generic for other users. This was needed so we can determine if a given GPU image is compatible with the system just using the ELF.

https://github.com/llvm/llvm-project/pull/75624