[MacPorts] #18418: gdal-1.5.1 Update to version 1.6.0

[MacPorts]

#18418: gdal-1.5.1 Update to version 1.6.0
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 Reporter:  seanasy@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement        |      Status:  new                                  
 Priority:  Normal             |   Milestone:  Port Updates                         
Component:  ports              |     Version:  1.7.0                                
 Keywords:                     |        Port:  gdal                                 
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 This is a big patch that fixes  many issues including these tickets:
 #17632,
 #17578,
 #16342

 P.S. I don't have commit so someone else needs to do this for me.

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Ticket URL: <http://trac.macports.org/ticket/18418>
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