[master] add missing file

bin/tests/system/nslookup/ns1/example.net.db

+; Copyright (C) 2016  Internet Systems Consortium, Inc. ("ISC")
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+$TTL 3600
+
+@		86400	IN SOA	ns1 hostmaster (
+					1397051952 ; "SER0"
+					5
+					5
+					1814400
+					3600 )
+@			NS	ns1
+ns1			A	10.53.0.1
+
+a-only			A	1.2.3.4
+aaaa-only		AAAA	2001::ffff
+
+dual			A	1.2.3.4
+			AAAA	2001::ffff
+
+cname-a-only		CNAME	a-only
+cname-aaaa-only		CNAME	aaaa-only
+cname-dual		CNAME	dual