tcp-udp-tunnel-test: Add test case to test TCP/UDP tunnel.

Refs: #1362

Change-Id: I78f558f61ddd0cf0a363e56081e2e4c735d8156e
diff --git a/test_unixface/unix-face-test.sh b/test_unixface/unix-face-test.sh
index 0599a8f..62d64ea 100755
--- a/test_unixface/unix-face-test.sh
+++ b/test_unixface/unix-face-test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 mkdir -p logs
 clean_up() {
     r=$(sudo killall ndn-traffic-server 2>&1)