[MacPorts] #60784: gdal @3.1.1: update to 3.1.2

[MacPorts]

#60784: gdal @3.1.1: update to 3.1.2
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  Reporter:  Dave-Allured                           |      Owner:  Veence
      Type:  update                                 |     Status:  assigned
  Priority:  Normal                                 |  Milestone:
 Component:  ports                                  |    Version:
Resolution:                                         |   Keywords:
      Port:  gdal gmt4 gmt5 gmt6 postgis2 postgis3  |
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Changes (by Dave-Allured):

 * port:  gdal, gmt => gdal gmt4 gmt5 gmt6 postgis2 postgis3


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Ticket URL: <https://trac.macports.org/ticket/60784#comment:3>
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