swift234

[Clang importer] swift_newtype'd types are bridged when their underlying types are.

A swift_wrapper/swift_newtype'd type can wrap a bridged type. In such
cases, we need to report both the unbridged type (which is the
unbridged underlying type) and the bridged type (which is the
importer-created wrapper type). This fixes a problem where Objective-C
generic specializations would use the wrapper types on type parameters
with "AnyObject" constraints, which... doesn't work.

Fixes rdar://problem/26340353.