setup.py installs usr/CHANGES.md and usr/LICENSE

[z3ntu]

As written in the title, when running python3 setup.py install --prefix=/usr --root="$pkgdir" as part of distribution packaging, it will install the files usr/CHANGES.md and usr/LICENSE

[JamiKettunen]

+1, this also affects pip install extract-dtb for system-wide (same /usr/{CHANGES.md,LICENSE} created) and pip install --user extract-dtb (~/.local/{CHANGES.md,LICENSE} created).
It appears to be caused by https://github.com/PabloCastellano/extract-dtb/blob/1.2.3/setup.py#L24
@PabloCastellano Could these simply not be copied over like this, or perhaps instead under another dir?