ghc: 7.8.3

Starts the process of closing [31609](https://github.com/Homebrew/homebrew/issues/31609). The patches previous in :DATA have been merged with this release and consequently are no longer required. There is also currently no dev build available, so that has been scrapped as well.
[This](https://gist.github.com/DomT4/fee9ae0cc6ee3d84b5b2#) is my current edit. It still gives me the syntax "end" error.