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

[Alexander Yermolovich via llvm-commits]

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

ah cool, ULEB.
LGTM

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