Handle invokespecial edge case

[jvilk]

We need to write a test that covers the following crazy scenario:
http://stackoverflow.com/a/8950564

Essentially, we need to write a test that has the following inheritance hierarchy:

C (child of C) -> B (child of A) -> A (parent)

A should implement a method foo, and C should override it. C's implementation should call super.foo().

We compile C against a version of B that does not have foo defined. At runtime, we force C to execute with a version of B that does have foo defined.

As currently defined, doppio will incorrectly execute A.foo(), because it will not perform the needed lookup.

We can accomplish this by having the foo version of B in a subfolder of our test folder, and put it on the classpath only at runtime.

[jvilk]

We will also need to see if there is a way to force javac to emit an invokespecial call that uses the old semantics, e.g. in which case super.foo() should invoke A.foo(). Perhaps this can be achieved through specifying a different target version.