The only case we may need fake override for private members is
a situation when class refers itself with different type arguments.
So in this commit we forbid such fake overrides when we can prove
that class does not refers itself here.
Current implementation of calls with super qualifier relies on
invokespecial, which has some more constraints than regular virtual
invocations. When those constraints aren't met, accessors are needed.
Mikhail Glukhikh