[PATCH] kbuild: save ARCH & CROSS_COMPILE when building a kernel

[Sam Ravnborg]

I have tested this locally - but it would
be good if someone with different habits than me try it
out before it hits -next.

So far it works for me.

Last time I tries this it failed in strange ways in different setups.
But I think I have addressed this by postponing the settings to *config
time _after_ including the arch specific makefile.

This patch is a prerequisite for a small serie of patches to clean up
how we handle generated files.

	Sam