swift234

Build swift.swift as part of the swift runtime.  The CMake changes here aren't complete, but Doug said he would fix that.

This should be enough to allow statically compiling swift applications.  As followups, I'm going to additionally start installing swift.swift to a common location, and start  making REPL/script mode aware that these functions are available, so they don't bother to IRGen them.

I'm leaving around some files in runtime/ which aren't necessary with this commit; I'll delete them in a separate commit.



Swift SVN r1725