[GHC] #7932: haskell-src-exts should depend on happy

[GHC]

#7932: haskell-src-exts should depend on happy
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Reporter:  JasonGross  |          Owner:                   
    Type:  bug         |         Status:  new              
Priority:  normal      |      Component:  libraries (other)
 Version:  7.4.2       |       Keywords:                   
      Os:  Linux       |   Architecture:  Unknown/Multiple 
 Failure:  Other       |      Blockedby:                   
Blocking:              |        Related:                   
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Comment(by parcs):

 Unfortunately you can't depend on `happy` because `happy` only provides an
 executable, not a library. But one could get around this limitation by
 having the `happy` package  install a (dummy) library.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7932#comment:2>
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