[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:  dreixel
            Type:  feature request   |           Status:  patch
        Priority:  normal            |        Milestone:
       Component:  libraries/base    |          Version:  7.8.2
      Resolution:                    |         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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Comment (by ocharles):

 hvr - as mentioned on Github, I was somewhat intending to squash this down
 into a single commit when I'm done. If you'd like, I could simply omit
 whitespace changes from this. My editor does it for me, so I sometimes
 forget it is happening :)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9043#comment:7>
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