qemu-iotests: explicitly use bash interpreter

The tests use bash language features like 'let', which aren't supported
by /bin/sh on systems that use a conservative shell like dash.  This
patch changes the interpreter to /bin/bash.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/qemu-iotests/018 b/tests/qemu-iotests/018
index c6233f1..0a348fe 100755
--- a/tests/qemu-iotests/018
+++ b/tests/qemu-iotests/018
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Merge backing file into test image when converting the image
 #