/usr/src/linux-headers-3.13.0-46-lowlatency/scripts/kconfig/lkc.h is in linux-headers-3.13.0-46-lowlatency 3.13.0-46.79.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/src/linux-headers-3.13.0-46-lowlatency/scripts/kconfig/../../../linux-headers-3.13.0-46/scripts/kconfig/lkc.h