[CI] am57xx-evm: linux-4.18.y 56f5edd347f5 Failure

Build URL: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.18/DISTRO=rpb,... Full log: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.18/DISTRO=rpb,... Parsed warnings/errors: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.18/DISTRO=rpb,... Git branch: linux-4.18.y Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git Git commit: 56f5edd347f5e53c3c0610c4e45e9e94c2d811e1

Errors: ERROR: ExpansionError during parsing /srv/oe/build/conf/../../layers/meta-rpb/recipes-overlayed/kselftests/kselftests-next_git.bb