[GHC] #5787: Add instances to ZipList

[GHC]

#5787: Add instances to ZipList
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    Reporter:  pumpkin           |       Owner:                  
        Type:  feature request   |      Status:  infoneeded      
    Priority:  normal            |   Milestone:  7.6.2           
   Component:  libraries/base    |     Version:  7.2.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Comment(by igloo):

 Where is the patch?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5787#comment:4>
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