ghc 8.0.2 release

• ghc 8.0.2
• cabal 1.24.0.2
• stack 1.3.2

Note this repo is mostly a stub. Most work is here https://github.com/mitchty/alpine-linux-ghc-bootstrap

I try to keep things up to date, but this is all mostly a as I get time for it thing.

Note, this will likely go away once it is upstreamed to alpine linux testing/community repos.