[MacPorts] #50297: gpsbabel: update to 1.5.3

[MacPorts]

#50297: gpsbabel: update to 1.5.3
----------------------+--------------------------------
 Reporter:  mp@…      |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.4
 Keywords:  haspatch  |       Port:  gpsbabel
----------------------+--------------------------------
 gpsbabel updated to 1.5.3

 (gpsbabel has moved to github)

 Builds fine both universal and non-universal on Mavericks.

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Ticket URL: <https://trac.macports.org/ticket/50297>
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