Fix format error

Author: arjunr2

src/unix/linux_like/linux/musl/b64/wasm32/mod.rs

@@ -58,7 +58,7 @@ s! {
         pub mode: ::mode_t,
         pub __seq: ::c_int,
         __unused1: ::c_long,
-        __unused2: ::c_long
+        __unused2: ::c_long,
     }
 }