Rollup merge of rust-lang#59480 - gnzlbg:us, r=alexcrichton

Centril · web-flow · commit ee172673c1b5 · 2019-03-29T12:32:29.000+01:00
Update stdsimd This PR fixes a regression introduced by ACLE support on thumbv4 targets, see: rust-lang/stdarch#704 .
diff --git a/src/stdsimd b/src/stdsimd
@@ -1 +1 @@
-Subproject commit 359845eb7cae85799dc2ec81f2fb05da0aa6276d
+Subproject commit 12bdc2ed6b32653866d02b42f0885d9cd8bd295e
