[oe] [RFC] Fix uImage generation in way compatible with kernel.bbclass

[Graeme Gregory]

Koen Kooi wrote:
 > Looks good, except for these bits of collateral damage:
> 
> -        if test -e arch/${ARCH}/boot/images/uImage ; then
> -             ln -f arch/${ARCH}/boot/images/uImage
> arch/${ARCH}/boot/uImage
> 
Actually isnt this bolloxed anyway by regenerating the uImage
in do_deploy?

Graeme