[MacPorts] #68991: exiv2: Update to 0.28.1

[MacPorts]

#68991: exiv2: Update to 0.28.1
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  Reporter:  alchymy  |      Owner:  ryandesign
      Type:  update   |     Status:  accepted
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  exiv2    |
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Comment (by ryandesign):

 There are a couple dozen ports that depend on exiv2. I only checked a
 handful of them on December 28, but half of those I checked did not build
 with this new version and need patches, so updating exiv2 is not
 straightforward and will require an extended concerted effort to identify
 and fix all of the problems at once, an effort which I'm not currently
 continuing.

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Ticket URL: <https://trac.macports.org/ticket/68991#comment:4>
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