[MacPorts] #20790: boxes: use configure.cc

[MacPorts]

#20790: boxes: use configure.cc
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 Reporter:  ryandesign@…             |       Owner:  wgrzemski@…        
     Type:  defect                   |      Status:  new                
 Priority:  Normal                   |   Milestone:                     
Component:  ports                    |     Version:  1.7.1              
 Keywords:                           |        Port:  boxes              
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 boxes is build using "gcc" but should be using whatever is in
 ${configure.cc}. See UsingTheRightCompiler.

 The attached patch fixes it. If you have no objection I'll commit it.

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Ticket URL: <http://trac.macports.org/ticket/20790>
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