[release-notes/gnome-3-30] Add gtk.png

[Link Dupont <link src gnome org>]

commit e6c22b0de3885fe1e36227c7b7856037d6515cc1
Author: Link Dupont <link sub-pop net>
Date:   Tue Sep 4 07:23:07 2018 -0700

    Add gtk.png

 help/Makefile.am | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/help/Makefile.am b/help/Makefile.am
index 9008a6d0..1baa4a8a 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -14,6 +14,7 @@ HELP_MEDIA = \
  figures/flatpak-1.0.png \
  figures/flatpak.png \
  figures/games-collection.png \
+ figures/gtk.png \
  figures/flatpak-updates.png \
  figures/performance.png \
  figures/placeholder.png \