[GHC] #7346: Allow the use of `deriving` for GHC generics

[GHC]

#7346: Allow the use of `deriving` for GHC generics
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        Reporter:  kosmikus          |            Owner:  dreixel
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Compiler          |          Version:  7.7
      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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Changes (by ghorn):

 * cc: gregmainland@… (added)


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7346#comment:10>
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