[GHC] #10609: Make up instances

[GHC]

#10609: Make up instances
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        Reporter:  fumieval          |                   Owner:
            Type:  feature request   |                  Status:  closed
        Priority:  normal            |               Milestone:
       Component:  libraries/base    |                 Version:  7.10.1
      Resolution:  fixed             |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D1049
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Comment (by bgamari):

 The `Traversable ZipList` instance was missing from the above commit and
 was added in a1c934c1b97a09db841d20da4811e0e1310f7511

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10609#comment:5>
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