Update stdarch submodule to stabilize simd_x86_bittest feature

JohnTitor · JohnTitor · commit b8b559cfcb60 · 2021-06-13T02:29:17.000+09:00
diff --git a/library/stdarch b/library/stdarch
@@ -1 +1 @@
-Subproject commit 1e05dffbeeb80ba61bf59cc63b222d538d7825ed
+Subproject commit 3001c75a1d2a81d2a76bef139c69387cb2ebb820
