RELEASE_28 SVN tag

Hello all,

According to: http://llvm.org/releases/2.8/docs/GettingStarted.html#checkout folks can check out a specific release from Subversion. As of right now, RELEASE_28 contains folders for each of the release candidates, as opposed to the final content. Same goes for Clang.

-Matt

I fixed the SVN tree. It should work now.

-bw