[GHC] #10726: Upgrade MingW-w64 distributions for windows

[GHC]

#10726: Upgrade MingW-w64 distributions for windows
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        Reporter:  Phyx-             |                Owner:
            Type:  task              |               Status:  patch
        Priority:  high              |            Milestone:  7.10.3
       Component:  Build System      |              Version:  7.11
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9218 #9014       |  Differential Rev(s):  Phab:D1123
  #10435                             |
       Wiki Page:                    |
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Comment (by bgamari):

 Alright, I've applied Luke's patch from comment:48 to `ghc-7.10` as
 bbbf79b91747dbb5ab284f075927d1e1e27aba95./ This will hopefully serve as a
 sufficient workaround for 7.10.3, although I do hope we can do better for
 8.0. Thanks for the testing, everyone!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10726#comment:57>
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