Rollup merge of rust-lang#55291 - kazcw:master, r=nikomatsakis

emilyalbini · web-flow · commit c4723b3673e6 · 2018-10-25T14:31:17.000+02:00
Update stdsimd submodule Fixes a SSE2 bug. (rust-lang#55249)
diff --git a/src/stdsimd b/src/stdsimd
@@ -1 +1 @@
-Subproject commit 307650500de5b44dc1047dc9d15e449e09d92b57
+Subproject commit 431766a3fbcfb6dafb2d5a3866c1609bf44ee554
