[GHC] #9550: Add uncons to Data.List

[GHC]

#9550: Add uncons to Data.List
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       Reporter:  dfeuer             |                   Owner:
           Type:  task               |                  Status:  new
       Priority:  normal             |               Milestone:
      Component:  libraries/base     |                 Version:  7.8.2
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:                     |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
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 This was discussed on the libraries list and favorably received

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9550>
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