[llvm] [HashRecognize] Recognize trunc-to-i1 little-endian bit check (PR #213883)

[Andreas Jonson via llvm-commits]

andjo403 wrote:

> I think this is a good change, even if it's hard to reproduce a full-pipeline example right now. Seems like the canonical form for a bit test like this is prone to change.

I'm working on and of at getting the regressions for https://github.com/llvm/llvm-project/pull/184182 fixed and that will introduce this pattern more so think it is a super good change :)  

https://github.com/llvm/llvm-project/pull/213883