fix semicolon

test/fixtures/generation/harmony-edgecase/exports/expected.js

@@ -4,6 +4,6 @@ export { a as b, c as d } from "hello";
 export { a as b, c as d };
 export {};
 export default i = 20;
-export function test() {};
+export function test() {}
 export var i = 20;
 export let i = 42;