[MacPorts] #26342: Update devel/msgpack to version 0.5.4

[MacPorts]

#26342: Update devel/msgpack to version 0.5.4
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 Reporter:  stromnov@…             |       Owner:  macports-tickets@…                   
     Type:  update                 |      Status:  new                                  
 Priority:  Normal                 |   Milestone:                                       
Component:  ports                  |     Version:  1.9.1                                
 Keywords:  haspatch               |        Port:  msgpack                              
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 Please, update msgpack to latest version (0.5.4).

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Ticket URL: <http://trac.macports.org/ticket/26342>
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