This QIODevice uses a temporary file for writing, so that in case of
write errors, the writing operation is canceled, without losing any
existing file. It also avoids having a partially-written file visible
by other processes, at the final destination.
Change-Id: I9482df45751cb890b1b6f1382ec2eea3eb980627
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
