Update stdsimd module to include rust-lang/stdarch@a19ca1c

steveklabnik · steveklabnik · commit 1f0172167840 · 2018-05-14T12:36:04.000-04:00
Backport of #50748
diff --git a/src/stdsimd b/src/stdsimd
@@ -1 +1 @@
-Subproject commit 2f86c75a2479cf051b92fc98273daaf7f151e7a1
+Subproject commit a19ca1cd91cf97777af8268a6136bd2e4648e189
