testwrapper.sh: Use /bin/sh instead of /bin/bash.

We don't use any bashisms.

diff --git a/testwrapper.sh b/testwrapper.sh
index bec33c0..f8593a1 100755 (executable)
--- a/testwrapper.sh
+++ b/testwrapper.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#! /bin/sh
 #
 # collectd -- testwrapper.sh
 #