update the stdsimd submodule

japaric · japaric · commit 9808f7cb397c · 2018-07-24T11:08:11.000-05:00
to bring in the doc generation fix
diff --git a/src/stdsimd b/src/stdsimd
@@ -1 +1 @@
-Subproject commit b9de11ab43090c71ff7ab159a479394df1f968ab
+Subproject commit 05c2f61c384e2097a3a4c648344114fc4ac983be
