qemustart allows easy testing of created images via `qemu`. The script
automatically selects created images and can setup e.g. networks.

As the x86 target now uses the generic image.mk the profile appears also
in the image name, this is *generic*.

Add the profile name to the qemustart script so it still finds the file.

Signed-off-by: Paul Spooren <mail@aparcar.org>