message: Print return value from pure WASM binary.
diff: @@ -661,11 +661,12 @@ fn execute_wasm(options: &Run) -> Result<(), String> {
  .map(|arg| arg.as_str())
  .map(|x| Value::I32(x.parse().unwrap()))
  .collect();
  - instance
  + let result = instance
  .dyn_func("main")
  .map_err(|e| format!("{:?}", e))?
  .call(&args)
  .map_err(|e| format!("{:?}", e))?;
  + println!("main() returned: {:?}", result);
  }
  }
  