Missing reexports

[reckenrode]

None of the tbd files in this repo have reexports, but Foundation at least should some (reexporting libobjc). You can see comparing the tbd file for it in the 11.0 SDK to the one here. This caused a failure in staging-next with a librsvg update, which was fixed in NixOS/nixpkgs#244471.

[toonn]

I think this is because the re-exports are absolute paths for the 10.12 stubs. Re-exports from Foundation.tbd:

re-exports:      [ '/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation', 
                   '/usr/lib/libobjc.A.dylib' ]

When generating newer stubs this no longer appears to be the case:

re-exports: [! '@CoreFoundation@/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation',
             ! '@libobjc@/lib/libobjc.A.dylib']