[MacPorts] #64401: GTK 3 has unlisted dependency on lbzip2

[MacPorts]

#64401: GTK 3 has unlisted dependency on lbzip2
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 Reporter:  TruePath  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  gtk3
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 When I tried to upgrade gtk3 it failed because it couldn't find libzip2.
 This library is provided by the lbzip2 package but it's not listed as a
 dependency.

 I'm also having issues with the HB_VERSION_ATLEAST macro being undefined
 but I'll address that in another ticket.

 (Sorry I'm not submitting a patch but I don't have the portfiles
 downloaded as a git repo and didn't want to muck about creating copies and
 reminding myself which arg to diff goes first  and I'm sure someone with
 everything setup can dash off this patch in 2seconds)

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Ticket URL: <https://trac.macports.org/ticket/64401>
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