[MacPorts] #40835: sumo-devel: update svn url

[MacPorts]

#40835: sumo-devel: update svn url
--------------------------+--------------------------------
 Reporter:  ryandesign@…  |      Owner:  jens.fahnenbruck@…
     Type:  enhancement   |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  sumo-devel
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 This patch updates sumo-devel to use the new sourceforge svn url, and to
 use the `-W` argument to `system`. If you have no objections I can commit
 for you.

 However it does not fix the fetch failure reported in #40834.

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Ticket URL: <https://trac.macports.org/ticket/40835>
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