[GHC] #5115: Add capability set events

[GHC]

#5115: Add capability set events
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    Reporter:  sjanssen          |       Owner:                
        Type:  feature request   |      Status:  new           
    Priority:  normal            |   Component:  Runtime System
     Version:  7.1               |    Keywords:                
    Testcase:                    |   Blockedby:                
          Os:  Unknown/Multiple  |    Blocking:                
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown  
---------------------------------+------------------------------------------
 Add capability set events in the eventlog/tracing framework, as previously
 proposed: http://www.haskell.org/pipermail/cvs-ghc/2011-March/060453.html

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5115>
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