[gtk/gtk-3-24] meson: match autotools interface age

[Christoph Reiter <creiter src gnome org>]

commit e27f2a5c9216e63aa5dc26261495ac9e29ce8842
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Sun Sep 29 09:12:15 2019 +0200

    meson: match autotools interface age
    
    Noticed while diffing autotools/meson build results

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 1127047d24..262d691433 100644
--- a/meson.build
+++ b/meson.build
@@ -51,7 +51,7 @@ gtk_version       = meson.project_version()
 gtk_major_version = gtk_version.split('.')[0].to_int()
 gtk_minor_version = gtk_version.split('.')[1].to_int()
 gtk_micro_version = gtk_version.split('.')[2].to_int()
-gtk_interface_age = 4
+gtk_interface_age = 7
 add_project_arguments('-DGTK_VERSION="@0@"'.format(meson.project_version()), language: 'c')
 
 add_project_arguments('-D_GNU_SOURCE', language: 'c')