[CI] am57xx-evm: linux-4.18.y 04a3fbba60ae 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: 04a3fbba60ae3422f50a63b1672970a6eb0f7018

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