[MacPorts] #15451: cairo +universal doesn't build since 1.6.4

[MacPorts]

#15451: cairo +universal doesn't build since 1.6.4
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  Reporter:  ryandesign at macports.org  |       Owner:  ryandesign at macports.org
      Type:  defect                   |      Status:  new                    
  Priority:  Normal                   |   Milestone:  Port Bugs              
 Component:  ports                    |     Version:  1.6.0                  
Resolution:                           |    Keywords:                         
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Comment (by hvdwolf at gmail.com):

 I've attached a patch for the Portfile that should enable universal
 compilation. It works on my Intel system

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Ticket URL: <http://trac.macports.org/ticket/15451#comment:5>
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