Upgrade LLVM in appveyor
Upgrade LLVM in appveyor

TeamHypersomnia/Hypersomnia,TeamHypersomnia/Hypersomnia,TeamHypersomnia/Augmentations,TeamHypersomnia/Hypersomnia,TeamHypersomnia/Hypersomnia,TeamHypersomnia/Hypersomnia,TeamHypersomnia/Augmentations