heads up: BPF backend

It seems BPF backend review is coming to a close over on llvm-commits:
http://reviews.llvm.org/D6494
and will be landing as 'experimental backend' hopefully soon.
previous thread:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150112/thread.html#252080

Please speak up, review, comment.
Thanks!