BugLink: http://bugs.launchpad.net/bugs/1638700

The hio driver needs to accommodate handling the following which was
introduced in 4.3-rc1:

  commit 4246a0b6
  Author: Christoph Hellwig <hch@lst.de>
  Date:   Mon Jul 20 15:29:37 2015 +0200

    block: add a bi_error field to struct bio
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>