[cli] fix child table command (#2749)
[cli] fix child table command (#2749)


openthread/openthread,mszczodrak/openthread,lanyuwen/openthread,mszczodrak/openthread,georgecpr/openthread,jwhui/openthread,librasungirl/openthread,jwhui/openthread,LeZhang2016/openthread,abtink/openthread,chshu/openthread,srickardti/openthread,chshu/openthread,lanyuwen/openthread,chshu/openthread,lanyuwen/openthread,georgecpr/openthread,erja-gp/openthread,erja-gp/openthread,openthread/openthread,librasungirl/openthread,lanyuwen/openthread,librasungirl/openthread,lanyuwen/openthread,LeZhang2016/openthread,chshu/openthread,georgecpr/openthread,erja-gp/openthread,erja-gp/openthread,bukepo/openthread,openthread/openthread,gandreello/openthread,LeZhang2016/openthread,librasungirl/openthread,mszczodrak/openthread,abtink/openthread,chshu/openthread,mszczodrak/openthread,mszczodrak/openthread,georgecpr/openthread,turon/openthread,srickardti/openthread,LeZhang2016/openthread,lanyuwen/openthread,openthread/openthread,bukepo/openthread,bukepo/openthread,erja-gp/openthread,abtink/openthread,erja-gp/openthread,LeZhang2016/openthread,gandreello/openthread,gandreello/openthread,LeZhang2016/openthread,turon/openthread,srickardti/openthread,jwhui/openthread,gandreello/openthread,jwhui/openthread,georgecpr/openthread,gandreello/openthread,georgecpr/openthread,turon/openthread,abtink/openthread,chshu/openthread,mszczodrak/openthread,srickardti/openthread,turon/openthread,gandreello/openthread,bukepo/openthread