[OE-core] runqemu doesn't work with graphics through ssh

[Robert Yang]

The runqemu doesn't work with graphics through ssh, here are the
reproduce steps:

1) ssh -X (or -Y) to a host
2) runqemu qemux86

The qemu window would leap and leap, and can't be closed by click
the "close" button or "crtl-c".

the "runqemu nographic qemux86"

This happens on: Fedora 13 64bit and Ubuntu 11.10 64bit, the ssh connection
is from Ubuntu 11.10 32bit.

-- 
Thanks

Robert