Rollup merge of rust-lang#52535 - alexcrichton:update-stdsimd, r=Mark-Simulacrum

pietroalbini · web-flow · commit 7a0ffda92f03 · 2018-07-20T16:51:47.000+02:00
Update stdsimd to undo an accidental stabilization Closes rust-lang#52403
diff --git a/src/stdsimd b/src/stdsimd
@@ -1 +1 @@
-Subproject commit 886ff388fbbe8798e292431d824a5ff3c3458f4d
+Subproject commit 85208cf0978dbdf5630fea1d9e4a6a7b217f2acd
