[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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Comment (by Tamar Christina <tamar@…>):

 In [changeset:"490b9429a8ed3c55d17bf0964fb14582eb206a3d/ghc" 490b942/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="490b9429a8ed3c55d17bf0964fb14582eb206a3d"
 Automate GCC driver wrapper

 Summary:
 Everytime we upgrade the GCC version this wrapper needed updating.
 This is a big fragile and we kept forgetting it.

 Instead automate it so we don't have to worry about it.

 Test Plan: ./validate

 Reviewers: austin, bgamari

 Reviewed By: bgamari

 Subscribers: thomie, #ghc_windows_task_force

 Differential Revision: https://phabricator.haskell.org/D2820

 GHC Trac Issues: #12871
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12871#comment:8>
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