[GHC] #3727: several Haiku platform defs

[GHC]

#3727: several Haiku platform defs
---------------------------+------------------------------------------------
    Reporter:  donn        |       Owner:                     
        Type:  bug         |      Status:  new                
    Priority:  normal      |   Component:  Compiler           
     Version:  6.12.1 RC1  |    Keywords:                     
          Os:  Other       |    Testcase:                     
Architecture:  x86         |     Failure:  Building GHC failed
---------------------------+------------------------------------------------
 Attached diffs support the Haiku OS in several places where there are
 already platform tests.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3727>
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