glib-compat: add G_GNUC_DEPRECATED_FOR
glib-compat: add G_GNUC_DEPRECATED_FOR

G_GNUC_DEPRECATED_FOR was introduced in glib 2.26

mathslinux/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,guodong/spice-gtk,guodong/spice-gtk,mathslinux/spice-gtk,fgouget/spice-gtk,SPICE/spice-gtk,fgouget/spice-gtk,flexVDI/spice-gtk,SPICE/spice-gtk,elmarco/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,Fantu/spice-gtk,Fantu/spice-gtk,mathslinux/spice-gtk,flexVDI/spice-gtk,Fantu/spice-gtk,SPICE/spice-gtk,elmarco/spice-gtk,Fantu/spice-gtk,elmarco/spice-gtk,fgouget/spice-gtk,mathslinux/spice-gtk,guodong/spice-gtk,SPICE/spice-gtk,guodong/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk