swift234

Partial apply forwarder fix for going from single ref counted context to a generic argument

In the case we are forwarding from partial apply that captures a concrete ref
counted value to a generic function we need to use the swift retainable type
from the captured value rather than the type of the generic function we are
calling. The type of the generic argument is opaque and we can't allocate
storage for an opaque type.

rdar://24306823