LLVM 3.5 rebase

[Jens Petersen]

> I think the only way for ARM ghc is to do an llvm34 package.
> (I don't know when ghc will support 3.5 - perhaps for 7.10 which
> is now in development?)  ghc only needs llvm.armv7hl (and llvm-libs).

I went ahead and created a llvm34 package.

https://bugzilla.redhat.com/show_bug.cgi?id=1161014

If some kind person can help to review it that would
be appreciated.  It is heavily based on F21 llvm.spec.

Thanks, Jens