Add an account with a fixed, non-empty password

This is, apparently, needed by ONOS whose NETCONF client is not happy to
work with an empty password. Of course it's also insecure and very meh
in general, but hey, demo time.

Change-Id: I1b56732cfeb16e3f3710bfc9a9c51a5e1e2b0643
diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index c5663d9..490b7d4 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -18,6 +18,7 @@
 BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
 BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200=y
 # BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
+BR2_ROOTFS_USERS_TABLES="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/common/users"
 BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/common/overlay/ $(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/clearfog/overlay/"
 BR2_ROOTFS_POST_BUILD_SCRIPT="$(BR2_EXTERNAL_CZECHLIGHT_PATH)/board/czechlight/clearfog/copy-boot-scr.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh ${BR2_EXTERNAL_CZECHLIGHT_PATH}/board/czechlight/clearfog/usb-flash-genimage.sh"