[MacPorts] #69117: harfbuzz fails to compile on 10.5

[MacPorts]

#69117: harfbuzz fails to compile on 10.5
-----------------------+---------------------
  Reporter:  rmottola  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  leopard
      Port:  harfbuzz  |
-----------------------+---------------------

Comment (by kencu):

 I think just go ahead and add legacysupport to all these, and see if that
 fixes them.

-- 
Ticket URL: <https://trac.macports.org/ticket/69117#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS