[GHC] #9043: Add missing type class instances for data types in GHC.Generics

[GHC]

#9043: Add missing type class instances for data types in GHC.Generics
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       Reporter:  ocharles          |             Owner:
           Type:  feature request   |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  libraries/base    |           Version:  7.8.2
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 GHC.Generics offers a bunch of data types which have valid instances of
 various type classes in base, such as Functor. There's no good reason not
 to have these instances, so they should be added.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9043>
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