Fixes build failure caught by buildbot:
IEEE Std 802.15.4 Low-Rate Wireless Personal Area Networks support (IEEE802154) [M/n/y/?] m
6lowpan support over IEEE 802.15.4 (IEEE802154_6LOWPAN) [N/m/?] (NEW) aborted!
Console input/output is redirected. Run 'make oldconfig' to update configuration.
make[6]: *** [silentoldconfig] Error 1
make[5]: *** [silentoldconfig] Error 2
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 45357
