[MacPorts] #35897: Add a buildbot with +universal for all packages

[MacPorts]

#35897: Add a buildbot with +universal for all packages
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  Reporter:  mojca.miklavec.lists@…  |      Owner:  macports-tickets@…
      Type:  enhancement             |     Status:  new
  Priority:  Low                     |  Milestone:
 Component:  contrib                 |    Version:
Resolution:                          |   Keywords:
      Port:  mpab                    |
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Comment (by egall@…):

 For cross-referencing purposes, #39768 wanted one for the `+quartz`
 variant...

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Ticket URL: <https://trac.macports.org/ticket/35897#comment:13>
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