/usr/share/lintian/overrides/libc6-dev-x32 is in libc6-dev-x32 2.27-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # Those file are actually .o files not package in a ar archive, and
# thus should not be stripped
libc6-dev-x32: unstripped-binary-or-object */libmcheck.a
|