BUG: Module namespace objects have undefined Indirect exports

[rhuanjl]

There is a bug in the initialisation of module namespace objects when the module contains an indirect export.

Simple proof of concept

//test.mjs
export {bar as foo} from "./test.mjs";
export const bar = 5;
import * as stuff from "./test.mjs";

print(JSON.stringify(stuff)); //prints {"bar":5} - should print {"bar":5, "foo":5}
print(Object.getOwnPropertyNames(stuff)); // correctly prints "bar, foo"
print(stuff.foo); // prints undefined - should print 5

Credit @fatcerberus for finding that there was a CC bug here

EDIT: deleted info on where I thought the bug came from as I think what I'd posted was wrong.

[rhuanjl]

Found a solution for this whilst working on 5779.