[build] distcheck fix
[build] distcheck fix

GNOME/clutter-box2d,GNOME/clutter-box2d,clutter-project/clutter-box2d,clutter-project/clutter-box2d,clutter-project/clutter-box2d,GNOME/clutter-box2d,clutter-project/clutter-box2d,GNOME/clutter-box2d