x11-toolkits/wlroots: rebuild unchanged consumers after r535134

struct wlr_xwayland was extended but the new member were added in
the middle. Even if X11 apps still work there could be side effects.

$ GDK_BACKEND=x11 hikari -c /dev/null -a gtk3-demo
(gtk3-demo:78924): Gtk-WARNING **: cannot open display: \u0001