Bug#996093: lintian: detect variant of Lenna image

[Andrius Merkys <merkys@debian.org>]

Package: lintian
Version: 2.108.0

Hello,

I have located a variant Lenna image undetected by lintian in
python-docx upstream source [1] at
features/steps/test_files/lena_std.jpg. As requested by
license-problem-non-free-img-lenna tag, I am attaching md5sum, sha1sum,
and sha256 of this file:

$ md5sum features/steps/test_files/lena_std.jpg
dc0f99bbc6d31e7ce4000cc7c1117dbb  features/steps/test_files/lena_std.jpg
$ sha1sum features/steps/test_files/lena_std.jpg
3712585117d7f181f76a67cbbdca9c558cb39110
features/steps/test_files/lena_std.jpg
$ sha256sum features/steps/test_files/lena_std.jpg
8640b22549789d5aeabebb487b0b6cda05119c3bff8f67699850a0f8177532d7
features/steps/test_files/lena_std.jpg

[1] https://github.com/python-openxml/python-docx

Andrius