[MacPorts] #57047: virt-viewer @6.0: Update to 7.0, requires spice-gtk 0.35

[MacPorts]

#57047: virt-viewer @6.0: Update to 7.0, requires spice-gtk 0.35
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 Reporter:  matsimon  |      Owner:  (none)
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.5.3
 Keywords:  haspatch  |       Port:  virt-viewer spice-gtk
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 Dear port maintainer

 I wanted to check out if emulators/virt-viewer 7.0 was possible to get
 into macports and have tried to come up with a patch. It seems to work for
 me by connecting to a RHV/oVirt 4.2 cluster by using xorg-server from
 Macports itself.

 The only issue I ran into much later (but will compare with 6.0) is that
 sending the keys as provided in the GUI for i.e. Ctrl-Alt-Del does not
 work but does when i.e. sending  via keyboard.

 virt-viewer 7.0 requires gnome/spice-gtk to be bumped from 0.34 to 0.35 as
 well in order to build thus I will attach a second patch.

 This was tested on macOS 10.13.6, MacPorts 2.5.3 and Xcode 9.4.1

 Regards
 Mathieu

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Ticket URL: <https://trac.macports.org/ticket/57047>
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