Commits
Jordan Rose committed 182ef27f959
[ClangImporter] Handle __attribute__((availability(swift, unavailable))).
This is the new and improved version of
__attribute__((annotate("swift1_unavailable"))), with the "improved" being
specifically that the 'availability' attribute supports a message.
This requires a corresponding Clang commit.
Swift side of rdar://problem/18768673.
Swift SVN r27053