swift234

[Driver] Disallow bridging headers with framework targets.

While this appears to work, it causes problems down the line -- it's a
brittle configuration for debugging, and PrintAsObjC currently doesn't
fail gracefully if you reference a bridging-header-only type in your
public interface.

We definitely want something like this to work some day, but don't have
time to fix it now. Filed <rdar://problem/17615898>.

Swift SVN r19762