swift234

Update NSCocoaError to contain the entire Cocoa domain.

Extend the NSCocoaError enum to cover all of the error codes in the
Cocoa error domain. Note that we need to do something awful for the
AppKit and CoreData errors, effectively redeclaring all of the
constants locally, because we cannot import AppKit and CoreData into
the Foundation overlay. It's not clear whether this blatant layering
violation will stand, but this at least improves coverage.

Also note that there are a number of warnings when building this code,
because some of the availability checks specify availability earlier
than our minimum deployment target. They're harmless and can be
cleaned up later.

Part of rdar://problem/20536610.

Swift SVN r28522