Hash#compare_by_identity

untagged with untranslated

translate with error:
```
[translation:ERROR]  AnnotatorError: ("Cannot find attribute 'set_eq_func' on SomeOrderedDict(bookkeeper=<rpython.annotator.bookkeeper.Bookkeeper object at 0x44dee90>, dictdef=<{SomeImpossibleValue(): SomeImpossibleValue()}>)", <
[translation:ERROR]  v1 = getattr(v0, ('set_eq_func'))
[translation:ERROR] In <FunctionGraph of (topaz.objects.hashobject:65)method_set_default_proc at 0x77c48d0>:
[translation:ERROR] Happened at file topaz/objects/hashobject.py line 70
[translation:ERROR]
[translation:ERROR] ==>         self.contents.set_eq_func(space.equal_w)
```