[GHC] #12871: Upgrade Mingw-w64 bindist for GHC to GCC 6.2.0 and Binutils 2.27.2

[GHC]

#12871: Upgrade Mingw-w64 bindist for GHC to GCC 6.2.0 and Binutils 2.27.2
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        Reporter:  Phyx-             |                Owner:  Phyx-
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2749
       Wiki Page:                    |  Phab:D2810
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Changes (by Phyx-):

 * differential:  Phab:D2749 => Phab:D2749 Phab:D2810


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12871#comment:6>
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