[yocto] Add extra parameters for qemu script

[Ke, Liping]

Hi, Scott

Thanks for the review! Sure, I will use the script following distro-team conventions.

And also, $MYNAME will be used in the final patch. And the debug line for building will be
removed when I send the final patch.

Thanks & Regards,
criping

> One final thing - when you resubmit your patch this time, could you use
> the create-pull-request/send-pull-request scripts? That way the patch
> can be pulled in by Richard or Saul with minimal effort, and it will
> help ensure you get proper credit in the commit log.
> 
> Scott
> 
> --
> Scott Garman
> Embedded Linux Distro Engineer - Yocto Project