[MacPorts] #37034: plplot: use cmake portgroup

[MacPorts]

#37034: plplot: use cmake portgroup
--------------------------+-----------------------
 Reporter:  ryandesign@…  |      Owner:  takeshi@…
     Type:  enhancement   |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  plplot
--------------------------+-----------------------
 The plplot portfile could probably be simplified by using the cmake
 portgroup.

-- 
Ticket URL: <https://trac.macports.org/ticket/37034>
MacPorts <http://www.macports.org/>
Ports system for Mac OS