It looks like you changed the file permissions. From Jenkins:
File src/mainboard/lenovo/t420s/devicetree.cb has one or more executable bits set in the file permissions.
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: I21ac72fd5632e552bdcdbd573cf92b433ed545ff
Gerrit-Change-Number: 40281
Gerrit-PatchSet: 1
Gerrit-Owner: Name of user not set #1002895
Gerrit-Reviewer: Alexander Couzens <lynxis@fe80.eu>
Gerrit-Reviewer: Patrick Rudolph <siro@das-labor.org>
Gerrit-Reviewer: build bot (Jenkins) <no-reply@coreboot.org>
Gerrit-CC: Angel Pons <th3fanbus@gmail.com>
Gerrit-CC: Paul Menzel <paulepanter@users.sourceforge.net>
Gerrit-Comment-Date: Thu, 09 Apr 2020 07:57:36 +0000
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