Kconfig: Move rustccfg file to a more benign place

It's put in $(obj) now. Not sure if we'll need it, but there has been
some interest in rust support in coreboot, and removing support for it
would be more work than this, so let's just keep it around.

Change-Id: I532fde9625dbf7463752ef1af525b77d12676c93
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79342
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions