[PATCH] buildrom: Update kconfig to recent version

[Uwe Hermann]

See patch.

The actual patch is 
  buildrom_update_kconfig.patch.gz
but that's huge and totally unreadable so I recommend reviewing
  buildrom_update_kconfig_makefile.patch

That's the only change to the buildrom code itself, the rest is just
replacing the whole scripts/kconfig/ dir with the new kconfig.

I used the coreinfo kconfig/ with only a handful of string replacements
a la s/coreinfo/buildrom/ so the diff to coreinfo's kconfig is tiny.

I did some ad-hoc testing with this, tried various kconfig targets
(menuconfig, xconfig, gconfig, ...) and various buildrom builds and
it seems to work fine so far, but some more testing by others is
highly appreciated.

Thanks, Uwe.