[gsettings] Require gio 2.25.0 to build the backend
[gsettings] Require gio 2.25.0 to build the backend

Distrotech/GConf,Distrotech/GConf,hyperair/gconf-gdbus,hyperair/gconf-gdbus,Distrotech/GConf,GNOME/gconf,GNOME/gconf,GNOME/gconf,hyperair/gconf-gdbus,GNOME/gconf,Distrotech/GConf,hyperair/gconf-gdbus