swift234

SILGen: Emit generic subclasses of @objc classes using ObjC allocation.

Although we don't expose their method and initializer entrypoints as @objc, generic @objc subclasses still need to inherit ObjC allocation from their superclass. A partial fix to <rdar://problem/16309189>, though there is still some IRGen fallout to chase out, causing test/IRGen/objc_subclass.swift to fail (as well as the test case from the radar).

Swift SVN r14991