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.
![screen shot 2014-08-16 at 22 13 20](https://cloud.githubusercontent.com/assets/6998367/3943150/38f2ecf2-258a-11e4-8bdd-d5e6ce70b6a9.png)