[GHC] #5556: Support pin-changing on ByteArray#s

[GHC]

#5556: Support pin-changing on ByteArray#s
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    Reporter:  pumpkin           |       Owner:              
        Type:  feature request   |      Status:  new         
    Priority:  normal            |   Component:  Compiler    
     Version:  7.2.1             |    Keywords:              
    Testcase:                    |   Blockedby:              
          Os:  Unknown/Multiple  |    Blocking:              
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown
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Changes (by thoughtpolice):

 * cc: as@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5556#comment:6>
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