Updated Haskell packages.

 - bson: updated to version 0.2.0
 - cpu: updated to version 0.1.1
 - defaults.nix: cosmetic
 - iteratee: updated to version 0.8.9.1
 - ListLike: updated to version 3.1.5
 - mongoDB: updated to version 1.3.0
 - packages.nix: cosmetic
 - stringsearch: added version 0.3.6.3
 - system-fileio: updated to version 0.3.8
 - wai-extra: updated to version 1.2.0.5

svn path=/nixpkgs/trunk/; revision=34517