[MacPorts] #56435: selfupdate should use parallel build

[MacPorts]

#56435: selfupdate should use parallel build
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 Reporter:  ryandesign   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.4.99
 Keywords:               |       Port:
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 Is there a good reason why selfupdate doesn't build MacPorts base in
 parallel?

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Ticket URL: <https://trac.macports.org/ticket/56435>
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