Various misc changes to convert bitbake to python3 which don't warrant
separation into separate commits.
(Bitbake rev: d0f904d407f57998419bd9c305ce53e5eaa36b24)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Some tweaks to use python 3 syntax in a python 2 compatible way.
(Bitbake rev: 322949c77dbaa4db01b5a43d85b39a2af67ba7b2)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>