Reflect.field on public static inline return null

With the nightly build e477477 (2017-10-01 21:32);
If I want resolve an `public static inline` with `Reflect.field`, I get null.
Without `inline` is working.

```haxe
class Test {

public static inline var TEST="hehe";

public static function main() {
trace("Haxe is great!");
var classReference : Class = Type.resolveClass( "Test" );
trace("Test.TEST: " + Test.TEST);
trace(Reflect.field(Test, "TEST"));
}
}
```
`haxe -main Test.hx -php test && php test/index.php`

Related to HaxeFoundation/haxe#6583
hexMachina failing test : https://travis-ci.org/DoclerLabs/hexCore/jobs/282173307#L1135

cc @RealyUniqueName