[MacPorts] #36404: bob: use github portgroup

[MacPorts]

#36404: bob: use github portgroup
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  Reporter:  ryandesign@…  |      Owner:  andre.anjos@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.2
Resolution:                |   Keywords:  haspatch
      Port:  bob           |
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Comment (by ciserlohn@…):

 The github portgroup does the livecheck on the tags, not on the download
 page/distributed sources. If there (always) will be a corresponding
 release for a tag, fine. Otherwise I would opt for a custom livehcheck on
 https://github.com/idiap/bob/wiki/Releases or
 https://github.com/idiap/bob/downloads.

 @Ryan:
 Maybe we could improve the github portgroup to handle cases like this
 (using the github download site(s)) more easily?

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Ticket URL: <https://trac.macports.org/ticket/36404#comment:3>
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