update stdsimd

diff --git a/src/stdsimd b/src/stdsimd
index ab9356f2af650815d339d77306f0d09c44d531ad..bcb720e55861c38db47f2ebdf26b7198338cb39d 160000 (submodule)
--- a/src/stdsimd
+++ b/src/stdsimd
@@ -1 +1 @@
-Subproject commit ab9356f2af650815d339d77306f0d09c44d531ad
+Subproject commit bcb720e55861c38db47f2ebdf26b7198338cb39d