[MacPorts] #55879: cargo: add universal variant

[MacPorts]

#55879: cargo: add universal variant
--------------------------+------------------------
  Reporter:  ryandesign   |      Owner:  seanfarley
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  duplicate    |   Keywords:
      Port:  cargo        |
--------------------------+------------------------
Changes (by seanfarley):

 * status:  new => closed
 * resolution:   => duplicate


Comment:

 As you mentioned in the other ticket, I'll just add `installs_libs no`.

--
Ticket URL: <https://trac.macports.org/ticket/55879#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS