qemu-img: Add progress output for amend

Now that bdrv_amend_options() supports a status callback, use it to
display a progress report.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: BenoƮt Canet <benoit.canet@nodalink.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1414404776-4919-3-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 04c207d..9567774 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -70,8 +70,8 @@
 ETEXI
 
 DEF("amend", img_amend,
-    "amend [-q] [-f fmt] [-t cache] -o options filename")
+    "amend [-p] [-q] [-f fmt] [-t cache] -o options filename")
 STEXI
-@item amend [-q] [-f @var{fmt}] [-t @var{cache}] -o @var{options} @var{filename}
+@item amend [-p] [-q] [-f @var{fmt}] [-t @var{cache}] -o @var{options} @var{filename}
 @end table
 ETEXI