[lldb] [llvm] [llvm] Add format check for MCSubtargetFeatures (PR #180943)

[Georgiy Samoylov via llvm-commits]

sga-sc wrote:

For successful test passing we need to fix a feature string constructor in DisassemblerLLVMC in lldb. Separate PR for this purpose: https://github.com/llvm/llvm-project/pull/184355

https://github.com/llvm/llvm-project/pull/180943