runtestcases.sh: Use portable shebang

diff --git a/test/runtestcases.sh b/test/runtestcases.sh
index 40f60db9a49255a95f9a768d444b2f122a854cea..22b9166482a5faf22691c578d45b392642455a23 100755 (executable)
--- a/test/runtestcases.sh
+++ b/test/runtestcases.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 cmd=$1
 dir=${2:-.}