Do not copy kernel to kernel.old

[Steve Bertrand]

Hi all,

Many of my routers boot/run from a USB thumb stick. To upgrade these
routers, I "dd" the device onto another one, pop the backup into a build
machine, and do the normal build*/install* with a DESTDIR parameter.

If the upgraded device does not boot (due to kernel problems), I just
wipe it clean and start over.

Having a kernel.old in this case is a waste of time and of space. Is
there any parameter I can tell the build process to ensure that the
kernel.old work does not get done?

Steve
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