[GHC] #13519: hWaitForInput does not work on linux.

[GHC]

#13519: hWaitForInput does not work on linux.
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        Reporter:  junji.hashimoto   |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by junji.hashimoto):

 This is the same as a comment of
 https://ghc.haskell.org/trac/ghc/ticket/8684.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13519#comment:2>
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