Update stdsimd

diff --git a/src/stdsimd b/src/stdsimd
index 359845eb7cae85799dc2ec81f2fb05da0aa6276d..12bdc2ed6b32653866d02b42f0885d9cd8bd295e 160000 (submodule)
--- a/src/stdsimd
+++ b/src/stdsimd
@@ -1 +1 @@
-Subproject commit 359845eb7cae85799dc2ec81f2fb05da0aa6276d
+Subproject commit 12bdc2ed6b32653866d02b42f0885d9cd8bd295e