swift

5a55760d - [Runtime] Teach BridgeObjectBox::retain() not to drop the "not native" bit.

[Runtime] Teach BridgeObjectBox::retain() not to drop the "not native" bit. The "not native" bit in a BridgeObject is important, because it tells us when we need to go through the Objective-C -retain method vs. swift_retain. Losing the bit means that swift_retain() will stomp on some memory within an Objective-C object, thinking its the inline reference count. Co-debugged with Arnold, who then found where this bit was getting dropped. Fixes rdar://problem/39629937.