[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:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Core Libraries    |              Version:  7.8.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:  9766              |             Blocking:
 Related Tickets:  #8778             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I checked, and it turns out that derived `Traversable` instances for
 `URec` won't kind-check at the moment. This isn't a fundamental limitation
 of `Traversable`, however. I've opened #11174 regarding this issue.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9043#comment:35>
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