/usr/share/lintian/overrides/samba-common is in samba-common 2:4.2.14+dfsg-0+deb8u9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # This is on purpose to hide sensitive information
samba-common: non-standard-dir-perm var/log/samba/ 0750 != 0755
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