[GHC] #10795: Upgrade gcc in 7.10

[GHC]

#10795: Upgrade gcc in 7.10
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        Reporter:  joozek78          |                   Owner:
            Type:  task              |                  Status:  closed
        Priority:  normal            |               Milestone:  7.10.3
       Component:  Build System      |                 Version:  7.10.2
      Resolution:  duplicate         |                Keywords:
Operating System:  Windows           |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #10726            |  Differential Revisions:
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Comment (by rwbarton):

 Upgrading gcc in a point release is kind of scary, but if it's necessary
 and just on Windows...

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10795#comment:3>
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