[llvm] [ELF] handle new NVIDIA GPU variants. (PR #151604)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> @jhuber6 Fun fact: the`f` architecture variant does **not** have any distinguishing marks in the ELF header. It looks like a plain un-suffixed arch. It does get packed as an `f` arch into the fatbin, but NVIDIA apparently forgot to reflect the `f` arch in cubin. :-/

I've learned to stop questioning things when it comes to NVIDIA's binary decisions. Add it to such gems like the PTX `.section` keyword only working in debug mode.

https://github.com/llvm/llvm-project/pull/151604