[MacPorts] #30965: update gdal to 1.8.1

[MacPorts]

#30965: update gdal to 1.8.1
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 Reporter:  shadow@…          |       Owner:  seanasy@…        
     Type:  update            |      Status:  new              
 Priority:  Normal            |   Milestone:                   
Component:  ports             |     Version:                   
 Keywords:  haspatch          |        Port:  gdal             
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Comment(by seanasy@…):

 This looks fine to me. Please commit.

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Ticket URL: <https://trac.macports.org/ticket/30965#comment:2>
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