[MacPorts] #15480: mpfr: enable parallel build

[MacPorts]

#15480: mpfr: enable parallel build
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 Reporter:  ryandesign at macports.org  |       Owner:  vinc17 at macports.org
     Type:  enhancement              |      Status:  new                
 Priority:  Normal                   |   Milestone:  Port Enhancements  
Component:  ports                    |     Version:  1.6.0              
 Keywords:                           |  
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 I think the parallel build feature should be enabled for mpfr. It works
 for me with buildmakejobs set to 2.

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Ticket URL: <http://trac.macports.org/ticket/15480>
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