Description of problem:
I see at
https://taskotron.fedoraproject.org/artifacts/all/e40b4a1e-1b7e-11e9-9451-525400fc9f92/tests.yml/rpmgrill.json
that the icon installed at
/usr/share/pixmaps/freedink.png
is not detected.

Version-Release number of selected component (if applicable):
(the one at taskotron)

How reproducible:
Always

Steps to Reproduce:
1. The .desktop file mentions Icon=xxx
2. Install icon at /usr/share/pixmaps/xxx.png

Actual results:
Icon file <var>xxx</var> not found"

Expected results:
OK

Additional info:

I see that DesktopLint.pm contains:
        $icon_re = qr{^/usr/share/(icons|pixmaps)/.*\Q/$icon\E\.(png|xpm|svg)$};
which means it enforces a sub-directory (/$icon instead of $icon).
/usr/share/pixmaps is flat (unlike /usr/share/icons) so this is too strict.