report when NTAs added to multiple views

- the text returned by "rndc nta" when adding NTAs to multiple views
  was incorrectly terminated after the first line, so users only saw
  on NTA added unless they checked the logs.

bin/tests/system/rndc/tests.sh

@@ -656,5 +656,14 @@ grep "address family not supported" rndc.out.1.test$n > /dev/null || ret=1
 if [ $ret != 0 ]; then echo_i "failed"; fi
 status=`expr $status + $ret`
 
+n=`expr $n + 1`
+echo_i "check rndc nta reports adding to multiple views ($n)"
+ret=0
+$RNDCCMD 10.53.0.3 nta test.com > rndc.out.test$n 2>&1 || ret=1
+lines=`cat rndc.out.test$n | wc -l`
+[ ${lines:-0} -eq 2 ] || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=`expr $status + $ret`
+
 echo_i "exit status: $status"
 [ $status -eq 0 ] || exit 1