tc/basic: fix json output filter

tc/basic: fix json output filter

The flowid and handle in basic were not using JSON routines to print.
 To reproduce the issue:

 $ tc qdisc add dev eth1 handle ffff: ingress
 $ tc filter add dev eth1 parent ffff: prio 20 protocol all u32 match ip dport 22 \
     0xffff action police conform-exceed drop/ok rate 100000 burst 15k flowid ffff:1

 $ tc filter add dev eth1 parent ffff: prio 255 protocol all basic action police \
     conform-exceed drop/ok rate 100000 burst 15k flowid ffff:3

Reported-by: Christian Pössinger <christian@poessinger.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>