[NFCI] Fix polly tests after b46c085d2b6d15873fb53718f0a70b3848e19e4a

That commit changed SCEVExpander to emit intrinsics instead of icmp+select,
but i forgot about polly, and i'm not sure if any bots complained.

GitOrigin-RevId: f449e5ef9bee553b9e3626ee70bcae13068a4403
2 files changed