package/libgtk3: bump to version 3.24.12
This will fix the build with latest pango thanks to
https://github.com/GNOME/gtk/commit/4c94a76237446f22646a5367bdf48b6b13eeff92
Fixes:
- http://autobuild.buildroot.org/results/f0eda37930ca3054bcc8ab3a8aef74bbc71b5997
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>