[MacPorts] #67408: gimp2,gtk3: submit latest patches to upstream

[MacPorts]

#67408: gimp2,gtk3: submit latest patches to upstream
---------------------+------------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.8.1
 Keywords:  pending  |       Port:  gtk3 gimp2
---------------------+------------------------
 For their latest releases, several patches have been applied to `gtk3` and
 `gimp2`. Submit PRs/MRs to upstream, in hopes of having the changes
 merged.

 Patches for `gtk3`:
 * `patch-quartz-meson-appleframeworks.diff`: patch
 `gdk/quartz/meson.build`, to make framework `CoreGraphics` optional; not
 available for 10.7 and earlier.

 Patches for `gimp2`:
 * `patch-updatecheck-nsurlsession.diff`: disable use of `NSURLSession` for
 macOS 10.8 and earlier; only available in 10.9 and later.

-- 
Ticket URL: <https://trac.macports.org/ticket/67408>
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