Squashed two changes together since both are needed to fix jobs:
Resolve PEP8
No idea how this happened, but reviews started failing the
pep8 gate job. The failures are legitimate, see the commit.
I guess the pep8 tests became smarter and found these issues.
(cherry picked from commit 52ff421e3d)
Add libc6-dev to bindep
The python-builder base image was updated to no longer install
recommends. This is inline with the other Infra images and keeps
image sizes smaller. gcc recommended libc6-dev - but it turns out
we need that for limits.h for one of our depends. Add it to fix
our image builds.
(cherry picked from commit 97d027caec)
Change-Id: Id9a0dad644134dafd68eed37fe8f41c583d7a619
a9e1a7981b