add simple test script.

tools/regression/lib/libc/resolv/resolv.t

@@ -0,0 +1,24 @@
+#!/bin/sh
+# $FreeBSD$
+
+do_test() {
+	number=$1
+	comment=$2
+	opt=$3
+	if ./$executable $opt; then
+		echo "ok $number - $comment"
+	else
+		echo "not ok $number - $comment"
+	fi
+}
+
+cd `dirname $0`
+
+executable=`basename $0 .t`
+
+make $executable 2>&1 > /dev/null
+
+echo 1..3
+do_test 1 'getaddrinfo()'     '-r mach'
+do_test 2 'gethostbyname()'   '-rH mach'
+do_test 3 'getipnodebyname()' '-rI mach'