Update binaryen to fix -Werror with GCC 8

diff --git a/src/binaryen b/src/binaryen
index 1c9bf65aa0e371b84755a8ddd6e79497fac57171..17841e155edf858c8ea7802dd5f5ecbef54b989f 160000 (submodule)
--- a/src/binaryen
+++ b/src/binaryen
@@ -1 +1 @@
-Subproject commit 1c9bf65aa0e371b84755a8ddd6e79497fac57171
+Subproject commit 17841e155edf858c8ea7802dd5f5ecbef54b989f