Do not use the latest pypi tarball, as it lacks several files (the LICENSE, for instance).
License-update: copyright years.
(From OE-Core rev: dd45da1c226bc87b4be5e9f065595aed316175a2)
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
