[GHC] #9218: Upgrade the version of MinGW shipped with GHC

[GHC]

#9218: Upgrade the version of MinGW shipped with GHC
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              Reporter:  komadori    |            Owner:  gintas
                  Type:  task        |           Status:  patch
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Build       |          Version:  7.8.2
  System                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:  Windows     |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:  #3390
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D339   |
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Comment (by awson):

 Perhaps I should mention this patch solves `swprintf` problem a bit
 differently from your approach (I've already
 [https://ghc.haskell.org/trac/ghc/ticket/9726#comment:1 commented on
 this]).

 Also I didn't test it on 32 bits for quite a long time (several months or
 so).

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9218#comment:14>
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