[MacPorts] #26993: update doxygen to version 1.7.2

[MacPorts]

#26993: update doxygen to version 1.7.2
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 Reporter:  tvb377@…       |       Owner:  macports-tickets@…                   
     Type:  update         |      Status:  new                                  
 Priority:  Normal         |   Milestone:                                       
Component:  ports          |     Version:  1.9.1                                
 Keywords:  haspatch       |        Port:  doxygen                              
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 checked for +no_x11 -docs -wizard

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Ticket URL: <https://trac.macports.org/ticket/26993>
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