[Haskell-cafe] Dockerfile for building ghc8.0 with ubuntu 16.04LTS

Hi cafe, I pushed Dockerfile for building ghc8.0 with ubuntu 16.04LTS. (If you need Debian and Arcanist, please use Greg's Dockerfile[1].) Dockerfile for Haskell GHC building https://github.com/takenobu-hs/ghc-build-docker Let's get familiar with ghc building and validating :) [1]: https://github.com/gregwebs/ghc-docker-dev [2]: https://ghc.haskell.org/trac/ghc/wiki/Building Enjoy, Takenobu