[GHC] #2123: implement waitForProcess using signals

[GHC]

#2123: implement waitForProcess using signals
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        Reporter:  simonmar          |                   Owner:  snoyberg
            Type:  task              |                  Status:  new
        Priority:  lowest            |               Milestone:  7.12.1
       Component:  Core Libraries    |                 Version:  6.8.2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Changes (by snoyberg):

 * cc: core-libraries-committee@… (added)
 * owner:  ekmett => snoyberg


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2123#comment:18>
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