[eval/lua] Reflect.hasField on function reference throws exception

[sebthom]

The following code works on all targets except interp/eval and lua.

class Test {
  static function foo() {
  }
  static function main() {
    trace(Reflect.hasField(foo, "bar")); // should print `false`
  }
}

Eval: Uncaught exception Unexpected value VFunction(#fun), expected object
Lua: attempt to index upvalue 'o' (a function value)

[Simn]

This is kind of covered by the "This is only guaranteed to work for anonymous structures." line in its documentation, but if you look into lua then I'm happy to also fix eval and make this consistent.

[sebthom]

I submitted PR #10994
It also includes a test case. The test is currently disabled for eval (until you had the chance to fix eval).

[sebthom]

@Simn thanks!