[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@…):

 Replying to [comment:6 michaelld@…]:
 > they do not work with the current GNU Radio master, but they should
 still work as stand-alone using the older version of GNU Radio

 I'd mark them all `replaced_by gnuradio-something`. If users want to
 install an older version of the gnuradio port using
 wiki:howto/InstallingOlderPort then they can install older versions of the
 relevant module ports the same way too.

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Ticket URL: <https://trac.macports.org/ticket/31475#comment:7>
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