message: Introduce std::int::add associated fn
diff: @@ -15,6 +15,7 @@ pub fn module() -> Result<Module, ContextError> {
  module.inst_fn("to_float", to_float)?;
  + module.inst_fn("abs", i64::abs)?;
  module.inst_fn("checked_add", i64::checked_add)?;
  module.inst_fn("checked_sub", i64::checked_sub)?;
  module.inst_fn("checked_div", i64::checked_div)?;
  