[GHC] #10468: debug test case fails on Windows

[GHC]

#10468: debug test case fails on Windows
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                   Owner:  scpmw
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.11
  (Debugging)                        |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Windows           |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:  debug
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by scpmw):

 Never got around to testing Windows... Fortunately less work than I had
 feared. The attached patch makes things work to the point where we can
 compile everything with `-g` and use gdb on the product.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10468#comment:1>
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