Rollup merge of #75009 - georgio:master, r=kennytm

Manishearth · web-flow · commit 1b350ecb60aa · 2020-08-02T13:08:43.000-07:00
Document the discrepancy in the mask type for _mm_shuffle_ps This Pull Request updates the `stdarch` submodule in order to resolve #62490
diff --git a/library/stdarch b/library/stdarch
@@ -1 +1 @@
-Subproject commit 311d56cd91609c1c1c0370cbd2ece8e3048653a5
+Subproject commit d6822f9c433bd70f786b157f17beaf64ee28d83a
