[GHC] #9945: export list for System.Posix.Internals breaking the build on Windows

[GHC]

#9945: export list for System.Posix.Internals breaking the build on Windows
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        Reporter:  MartinF           |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #9852             |  Differential Revisions:
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Comment (by dfeuer):

 I believe the correct way to do this is probably to change `CFilePath`
 from a type synonym to a `newtype`, and hide the details from users.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9945#comment:14>
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