[GHC] #4080: Use libcharset instead of nl_langinfo(CODESET) if possible.

[GHC]

#4080: Use libcharset instead of nl_langinfo(CODESET) if possible.
---------------------------------+------------------------------------------
    Reporter:  PHO               |        Owner:               
        Type:  bug               |       Status:  patch        
    Priority:  high              |    Milestone:  6.14.1       
   Component:  libraries/base    |      Version:  6.13         
    Keywords:  iconv locale      |   Difficulty:               
          Os:  Unknown/Multiple  |     Testcase:               
Architecture:  Unknown/Multiple  |      Failure:  Runtime crash
---------------------------------+------------------------------------------
Changes (by igloo):

  * priority:  normal => high
  * milestone:  => 6.14.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4080#comment:2>
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