[MacPorts] #20500: groovy version bump to 1.6.4

[MacPorts]

#20500: groovy version bump to 1.6.4
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 Reporter:  breskeby@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement            |      Status:  new                                  
 Priority:  Normal                 |   Milestone:                                       
Component:  ports                  |     Version:  1.7.1                                
 Keywords:                         |        Port:  groovy                               
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 groovy team just released version 1.6.4

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Ticket URL: <http://trac.macports.org/ticket/20500>
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