[lldb] [llvm] [lldb] Support disassembling RISC-V proprietary instructions (PR #145793)

[Jason Molenda via llvm-commits]

jasonmolenda wrote:

I'm also getting back an instruction size of 2 for the 48-bit instruction, in my unit test, it looks like.

https://github.com/llvm/llvm-project/pull/145793