message: Mock unimplemented cases for ___syscall54 (ioctl)
diff: @@ -188,7 +188,10 @@ pub extern "C" fn ___syscall54(
  debug!("ret: {}", ret);
  ret
  },
  - _ => unimplemented!(),
  + _ => {
  + debug!("emscripten::___syscall54 (ioctl) non implemented case {}", request);
  + 0
  + }
  }
  }
  