[MacPorts] #31034: Update qgis port to version 1.7

[MacPorts]

#31034: Update qgis port to version 1.7
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 Reporter:  nlebedev@…          |       Owner:  vince@…           
     Type:  update              |      Status:  new               
 Priority:  Normal              |   Milestone:                    
Component:  ports               |     Version:                    
 Keywords:                      |        Port:  qgis              
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Comment(by vince@…):

 I am aware of this since July, but I purposefully postponed the update
 until we have a Qt version compatible with clang, which is not the case
 yet, but should be in a very short time now (4.8 is supposed to be clang
 compatible, and ß1 is already out).

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Ticket URL: <https://trac.macports.org/ticket/31034#comment:2>
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