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

[GHC]

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

 It is not that we have decided ''not'' to produce 7.10.3.  It's just that
 we'll only produce it if it's actually needed!

 More specifically, we will produce 7.10.3 if (but only if)
  * there is a significant body of users
  * for whom 7.10.2 simply doesn't work
  * and there is no decent workaround they can use
  * and for which we can be reasonably sure that the fix isn't going to
 break anything else (necessitating 7.10.4 to mitigate).

 I don't know whether or not this ticket is in this category.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10726#comment:17>
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