[MacPorts] #31475: gnuradio: update to 3.4.1

[MacPorts]

#31475: gnuradio: update to 3.4.1
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 Reporter:  axeljaeger@…               |       Owner:  michaelld@…           
     Type:  update                     |      Status:  new                   
 Priority:  Normal                     |   Milestone:                        
Component:  ports                      |     Version:  2.0.3                 
 Keywords:                             |        Port:  gnuradio              
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Comment(by ryandesign@…):

 I wouldn't just delete them immediately, because users who already have
 them installed will thus keep them on their systems indefinitely, probably
 expecting them to still work and eventually be updated. The question is
 why are these ports no longer available upstream? Has their functionality
 been rolled into another port? If so, use replaced_by. Or is their
 functionality simply no longer available? That's trickier, but I'd
 probably make the port install only a readme file saying the software is
 gone; add notes to the port about this; and increase the revision to make
 this update available to users, so that they won't be left with obsolete
 software installed.

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Ticket URL: <https://trac.macports.org/ticket/31475#comment:3>
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