[gtk/wip/chergert/fix-dragicon-installation] build: fix gtkdragicon header installation

[Christian Hergert <chergert src gnome org>]

commit c1e9523f0ee597eb58baa64ec046ce9fbb5ee4f9
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jan 13 09:07:24 2020 -0800

    build: fix gtkdragicon header installation

 gtk/meson.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gtk/meson.build b/gtk/meson.build
index c2c3773fab..6f498f54f0 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -102,7 +102,6 @@ gtk_private_sources = files([
   'gtkcssvalue.c',
   'gtkcsswidgetnode.c',
   'gtkcustomlayout.c',
-  'gtkdragicon.c',
   'gtkfilechooserembed.c',
   'gtkfilechooserentry.c',
   'gtkfilechoosererrorstack.c',
@@ -214,6 +213,7 @@ gtk_public_sources = files([
   'gtkcssprovider.c',
   'gtkdialog.c',
   'gtkdragdest.c',
+  'gtkdragicon.c',
   'gtkdragsource.c',
   'gtkdrawingarea.c',
   'gtkeditable.c',
@@ -472,6 +472,7 @@ gtk_public_headers = files([
   'gtkdebug.h',
   'gtkdialog.h',
   'gtkdragdest.h',
+  'gtkdragicon.h',
   'gtkdragsource.h',
   'gtkdrawingarea.h',
   'gtkeditable.h',