openvswitch: multiple fixes for 2.10

- initscript: skip when ctl scripts are absent.  When only ovs is
   installed, this will quash error messages of ovn-ctl not found when
   invoking stop
 - openvswitch-common: include ovs-kmod-ctl
 - patches: ovs-save: compatible with busybox ip command

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

net/openvswitch/files/ovs-ctl-wrapper

@@ -3,6 +3,7 @@
 s=/usr/share/openvswitch/scripts
 case "$0" in
 	*ovs-ctl) "$s/ovs-ctl" "$@" ;;
+	*ovs-kmod-ctl) "$s/ovs-kmod-ctl" "$@" ;;
 	*ovn-ctl) "$s/ovn-ctl" "$@" ;;
 	*) exit 1;;
 esac