Fix importing filename in module-code/instn-star-err-not-found.js test

Fix the incorrect module filename.

test/language/module-code/instn-star-err-not-found-faulty_FIXTURE.js

 // Copyright (C) 2016 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
-export { x } from './inst-import-star-err-not-found-empty_FIXTURE.js';
+export { x } from './instn-star-err-not-found-empty_FIXTURE.js';

test/language/module-code/instn-star-err-not-found.js

@@ -26,4 +26,4 @@ negative: SyntaxError
 flags: [module]
 ---*/
 
-import * as ns from './inst-import-star-err-not-found-faulty_FIXTURE.js';
+import * as ns from './instn-star-err-not-found-faulty_FIXTURE.js';