patch applied (ghc-6.12/ghc): Add an entry about deriving instances for GADTs to the release notes

[Ian Lynagh]

Tue Dec  8 03:45:11 PST 2009  Ian Lynagh <igloo at earth.li>
  * Add an entry about deriving instances for GADTs to the release notes

    M ./docs/users_guide/6.12.1-notes.xml +7

View patch online:
http://darcs.haskell.org/ghc-6.12/ghc/_darcs/patches/20091208114511-3fd76-8daddc3cae1a86a64dc5d85e477dc8fc645d678b.gz