[MacPorts] #46241: git-flow update: bump subport git-flow-avh v1.7.0 -> v1.8.0

[MacPorts]

#46241: git-flow update: bump subport git-flow-avh v1.7.0 -> v1.8.0
---------------------------------+--------------------------------
 Reporter:  jason-macports@…     |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.3
 Keywords:  haspatch maintainer  |       Port:  git-flow-avh
---------------------------------+--------------------------------
 Gitflow AVH edition v1.8.0 was released 2014-10-01.  Update `Portfile`
 with new release version.

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Ticket URL: <https://trac.macports.org/ticket/46241>
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