[GHC] #7263: Add derived Show instances to GHC.Generics

[GHC]

#7263: Add derived Show instances to GHC.Generics
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        Reporter:  dag               |            Owner:  dreixel
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  GHC API           |          Version:  7.7
      Resolution:                    |         Keywords:  generics
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 monoidal):

 So the main part is already pushed, and the only remaining part is
 possibly adding `Ord` (comment:5). Let's finish the ticket.

 dreixel, spl: what's the decision - do we want `Ord` for `U1` only, or for
 all types which got Eq/Show/Read in
 [219ea0e539aca217fe1819baf02d4cdd1d670f51/base], or something else?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7263#comment:8>
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