Cabal patch: Add setup haddock --hoogle option

[Henning Thielemann]

On Sun, 20 Aug 2006, Neil Mitchell wrote:

> Hi,
> 
> The attached patch adds support for the --hoogle option to the haddock target.
> 
> Tested on the base package, now running:
> 
> runhaskell Setup haddock --hoogle
> 
> Gives the file base-2.0.txt which can then be fed into Hoogle properly.

Is it a good idea to tell this by an option to 'Setup haddock'? This means
manual intervention on each package which shall be used by Hoogle.