[MacPorts] #19334: gtk2: update to version 2.16.1

[MacPorts]

#19334: gtk2: update to version 2.16.1
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 Reporter:  devans@…             |       Owner:  nox@…           
     Type:  enhancement          |      Status:  new             
 Priority:  Normal               |   Milestone:  Port Updates    
Component:  ports                |     Version:  1.7.1           
 Keywords:                       |        Port:  gtk2            
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 See attached proposed patch that
   * updates gtk2 to version 2.16.1
   * drops patchfile patch-configure.diff now incorporated in distribution

 This is a gating item to upgrading many GNOME ports to the latest
 2.26 stable release branch.

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Ticket URL: <http://trac.macports.org/ticket/19334>
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