updating stream-fusion for GHC-7.10

[Duncan Coutts]

On Sun, 2015-10-04 at 16:03 +0200, Henning Thielemann wrote:
> Attached is a patch to the stream-fusion package that makes it compileable 
> by GHC-7.10. Unfortunately the authors did not reply to my patch request. 
> How can I get the patch into the package?

Henning, would you like to become maintainer of this package?

Ping me on IRC and we can sort it out.