modules/other/gail/gailtogglebutton.c: Add/remove indeterminate state
modules/other/gail/gailtogglebutton.c: Add/remove indeterminate state

GailToggleButton does not set/unset ATK_STATE_INDETERMINATE according to the
value of GtkToggleButton's inconsistent property.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=626537
(cherry picked from commit 86851b7ad36077a1ba32c976605bea46a07e1924)

johne53/MB3Gtk-2,Unity-Technologies/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Unity-Technologies/gtk,johne53/MB3Gtk-2,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,Unity-Technologies/gtk,Distrotech/gtk