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

tests/qemu-iotests/001

-#!/bin/sh
+#!/bin/bash
 #
 # Test simple read/write using plain bdrv_read/bdrv_write
 #

tests/qemu-iotests/002

-#!/bin/sh
+#!/bin/bash
 #
 # Test simple read/write using plain bdrv_pread/bdrv_pwrite
 #

tests/qemu-iotests/003

-#!/bin/sh
+#!/bin/bash
 #
 # Test simple read/write using bdrv_aio_readv/bdrv_aio_writev
 #

tests/qemu-iotests/004

-#!/bin/sh
+#!/bin/bash
 #
 # Make sure we can't read and write outside of the image size.
 #

tests/qemu-iotests/005

-#!/bin/sh
+#!/bin/bash
 #
 # Make sure qemu-img can create 5TB images
 #

tests/qemu-iotests/006

-#!/bin/sh
+#!/bin/bash
 #
 # Make sure qemu-img rejects > 127GB images for the vpc format as the format
 # doesn't support this.

tests/qemu-iotests/007

-#!/bin/sh
+#!/bin/bash
 #
 # Check for one possible case of qcow2 refcount corruption.
 #

tests/qemu-iotests/008

-#!/bin/sh
+#!/bin/bash
 #
 # Test simple asynchronous read/write operations.
 #

tests/qemu-iotests/009

-#!/bin/sh
+#!/bin/bash
 #
 # Nolan I qcow2 corruption - incorrectly reports free clusters
 #

tests/qemu-iotests/010

-#!/bin/sh
+#!/bin/bash
 #
 # Nolan II qcow2 corruption - wrong used cluster
 #

tests/qemu-iotests/011

-#!/bin/sh
+#!/bin/bash
 #
 # Test for AIO allocation on the same cluster
 #

tests/qemu-iotests/012

-#!/bin/sh
+#!/bin/bash
 #
 # Make sure we can open read-only images
 #

tests/qemu-iotests/013

-#!/bin/sh
+#!/bin/bash
 #
 # qcow2 pattern test, empty and compressed image - 4k cluster patterns
 #

tests/qemu-iotests/014

-#!/bin/sh
+#!/bin/bash
 #
 # qcow2 pattern test, complex patterns including compression and snapshots
 # Using patterns for 4k cluster size.

tests/qemu-iotests/015

-#!/bin/sh
+#!/bin/bash
 #
 # Combined test to grow the refcount table and test snapshots.
 #

tests/qemu-iotests/016

-#!/bin/sh
+#!/bin/bash
 #
 # Test I/O after EOF for growable images.
 #

tests/qemu-iotests/017

-#!/bin/sh
+#!/bin/bash
 #
 # Simple backing file reads
 #

tests/qemu-iotests/018

-#!/bin/sh
+#!/bin/bash
 #
 # Merge backing file into test image when converting the image
 #

tests/qemu-iotests/019

-#!/bin/sh
+#!/bin/bash
 #
 # When using a backing file for the output image in qemu-img convert,
 # the backing file clusters must not copied. The data must still be

tests/qemu-iotests/020

-#!/bin/sh
+#!/bin/bash
 #
 # Commit changes to backing file
 #

tests/qemu-iotests/021

-#!/bin/sh
+#!/bin/bash
 #
 # Test handling of invalid patterns arguments to qemu-io
 #

tests/qemu-iotests/022

-#!/bin/sh
+#!/bin/bash
 #
 # Test bdrv_load/save_vmstate using the usual patterns
 #

tests/qemu-iotests/023

-#!/bin/sh
+#!/bin/bash
 #
 # qcow2 pattern test with various cluster sizes
 #

tests/qemu-iotests/024

-#!/bin/sh
+#!/bin/bash
 #
 # Rebasing COW images
 #

tests/qemu-iotests/check

-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 # Copyright (c) 2000-2002,2006 Silicon Graphics, Inc.  All Rights Reserved.

tests/qemu-iotests/common

-#!/bin/sh 
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 # Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.

tests/qemu-iotests/common.config

-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 # Copyright (c) 2000-2003,2006 Silicon Graphics, Inc.  All Rights Reserved.

tests/qemu-iotests/common.filter

-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 # Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.

tests/qemu-iotests/common.pattern

-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 #

tests/qemu-iotests/common.rc

-#!/bin/sh
+#!/bin/bash
 #
 # Copyright (C) 2009 Red Hat, Inc.
 # Copyright (c) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.