[MacPorts] #17330: upgrade libtorrent-devel & rtorrent-devel to 0.12.4 & 0.8.4

[MacPorts]

#17330: upgrade libtorrent-devel & rtorrent-devel to 0.12.4 & 0.8.4
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 Reporter:  garribald@…               |       Owner:  gardnermj@…                    
     Type:  enhancement               |      Status:  new                            
 Priority:  Normal                    |   Milestone:  Port Updates                   
Component:  ports                     |     Version:  1.6.0                          
 Keywords:                            |        Port:  libtorrent-devel rtorrent-devel
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Comment(by macports@…):

 Those Portfiles compile and run fine on my Intel iMac. Just to save other
 people having to update them.

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Ticket URL: <http://trac.macports.org/ticket/17330#comment:3>
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