[GHC] #5846: Add GHC.Stats.gcStatsEnabled

[GHC]

#5846: Add GHC.Stats.gcStatsEnabled
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    Reporter:  tibbe              |       Owner:                  
        Type:  feature request    |      Status:  patch           
    Priority:  normal             |   Milestone:  7.6.1           
   Component:  libraries (other)  |     Version:  7.4.1           
    Keywords:                     |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple   |     Failure:  None/Unknown    
  Difficulty:  Unknown            |    Testcase:                  
   Blockedby:                     |    Blocking:                  
     Related:                     |  
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Comment(by tibbe):

 Patch looks good to me.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5846#comment:3>
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