Update wasi-libc submodule

tschneidereit · sunfishcode · commit 896a39551956 · 2019-07-24T15:49:44.000-07:00
diff --git a/src/wasi-libc b/src/wasi-libc
@@ -1 +1 @@
-Subproject commit 43b0c7f3320adde92a9647654c3e6042745bd37d
+Subproject commit 8df0d4cd6a559b58d4a34b738a5a766b567448cf
