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

[GHC]

#9550: Add uncons to Data.List
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              Reporter:  dfeuer      |            Owner:
                  Type:  feature     |           Status:  patch
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.8.2
             Component:              |         Keywords:
  libraries/base                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:              |  hour)
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D195   |
-------------------------------------+-------------------------------------

Comment (by nomeata):

 Sorry, I think I didn’t actually mean to push it yet without someone
 accepting the Differential Revision; I guess there was branch confusion on
 my side.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9550#comment:6>
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