[MacPorts] #30965: update gdal to 1.8.1

[MacPorts]

#30965: update gdal to 1.8.1
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 Reporter:  shadow@…          |       Owner:  macports-tickets@…                   
     Type:  update            |      Status:  new                                  
 Priority:  Normal            |   Milestone:                                       
Component:  ports             |     Version:  2.0.1                                
 Keywords:                    |        Port:  gdal                                 
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 gdal 1.8.1 is current. adds cutline cropping support, adds poppler
 support. poppler support included as a variant.

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Ticket URL: <https://trac.macports.org/ticket/30965>
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