Update stdsimd module to include https://github.com/rust-lang-nursery/stdsimd/commit/a19ca1cd91cf97777af8268a6136bd2e4648e189
Update stdsimd module to include https://github.com/rust-lang-nursery/stdsimd/commit/a19ca1cd91cf97777af8268a6136bd2e4648e189

GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,graydon/rust,graydon/rust