[GHC] #10485: Remove __MINGW32__ from all source files

[GHC]

#10485: Remove __MINGW32__ from all source files
-------------------------------------+-------------------------------------
        Reporter:  thomie            |                   Owner:  Berdes
            Type:  task              |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:  newcomer
Operating System:  Windows           |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D971
-------------------------------------+-------------------------------------
Changes (by Berdes):

 * status:  new => patch
 * differential:   => Phab:D971


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10485#comment:5>
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