[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:  patch
        Priority:  normal        |            Milestone:  8.2.1
       Component:  Compiler      |              Version:  8.0.1
      Resolution:                |             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:                |
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Changes (by Phyx-):

 * os:  Unknown/Multiple => Windows


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12871#comment:3>
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