[MacPorts] #50574: ganglia @3.1.7_1: update to 3.7.2

[MacPorts]

#50574: ganglia @3.1.7_1: update to 3.7.2
----------------------------+--------------------------------
 Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.3.4
 Keywords:  haspatch        |       Port:  ganglia
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 ganglia has been updated a number of times since the current Portfile was
 committed. The current version is 3.7.2, released July 10th 2015.

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Ticket URL: <https://trac.macports.org/ticket/50574>
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