gtk3 3.24.39-2

[Takashi Yano]

The following packages have been uploaded to the Cygwin distribution:

* gtk-update-icon-cache-3.24.39-2
* gtk3-demo-3.24.39-2
* libgtk3_0-3.24.39-2
* libgtk3-devel-3.24.39-2
* libgtk3-doc-3.24.39-2
* girepository-Gtk3.0-3.24.39-2
* libgailutil3_0-3.24.39-2
* libgailutil3-devel-3.24.39-2
* libgailutil3-doc-3.24.39-2

GTK+ is a multi-platform toolkit for creating graphical user
interfaces. Offering a complete set of widgets, GTK+ is suitable for projects
ranging from small one-off tools to complete application suites.

- Revive missing libgtk3-doc and libgailutil3-doc in 3.24.39-1.