Sometimes it is useful to reconfigure the qemu virtual machine
directly. runqemu has the "qemuparams" parameter for that, and the
underlying start() methods also supported modifying that via their
"params" parameter. Only the runqemu() wrapper function lacked
a way to specify additional parameters.
One potential usage is to attach additional disks.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
