[lldb] [llvm] [DWARF] Add DW_OP_LLVM_NVIDIA_mux vendor extension as a subop of DW_OP_LLVM_user (PR #216314)

[Eric Christopher via llvm-commits]

https://github.com/echristo approved this pull request.

There's still an unhandled opcode issue in lldb with this, but with the two options of implement or not allow I suggest we worry about that in a separate patch :)

Thanks for letting me send you things offline to review :)

https://github.com/llvm/llvm-project/pull/216314