setup.cfg: include llhttp LICENSE in license-files
Make sure that the llhttp LICENSE file is included in the wheel by
modifying setup.cfg's license-files field to be a list according to the
Python Packaging User Guide.
Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <wk.cvs.github@sydorenko.org.ua>
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>