[GHC] #9317: Add PolyKinds extension to Data.Monoid

[GHC]

#9317: Add PolyKinds extension to Data.Monoid
-------------------------------------+-------------------------------------
        Reporter:  bernalex          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  low               |               Milestone:
       Component:  libraries/base    |                 Version:  7.8.2
        Keywords:                    |  Differential Revisions:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
       Test Case:                    |              Difficulty:  Easy (less
        Blocking:                    |  than 1 hour)
                                     |              Blocked By:
                                     |         Related Tickets:
-------------------------------------+-------------------------------------
 PolyKinds got lost in 1d1ff77aaa09efaddc8cfe0dcf92d6763297cf11. See
 discussion here:
 <http://www.haskell.org/pipermail/libraries/2014-July/023261.html>.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9317>
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