qemurunner: add second qmp port

This will allow for direct ssh connection without breaking
the first one that is used for monitoring. The "nowait" option
will cause qmp server connection to NOT block waiting.

Signed-off-by: Saul Wold <saul.wold@windriver.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>