freeciv: Build also gtk3-gui of 2.5 version

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
freeciv: update 2.4 version to 2.4.3

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
freeciv: add compressing library dependencies

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>
freeciv: make 2.4 version the default one

Signed-off-by: Marko Lindqvist <cazfi74@gmail.com>