This updates the versions of the frozen images used to their current
version. The original reason for updating these images was to make sure
they are not affected by [CVE-2016-1252 / DSA-3733-1](https://lwn.net/Articles/709119/),
which is fixed in apt 1.0.9.8.4 and up.
Note that `CVE-2016-1252` won't affect our test-suite, because no packages
are installed during out tests. It is just "good practice" to keep these
images up to date.
The `debian:jessie`, and `buildpack-deps:jessie` in `Dockerfile.s390x`,
and `Dockerfile.armhf` have not been updated in this patch, because
those images have not yet been updated to contain apt 1.0.9.8.4.
While working on this, the `busybox` and `hello-world` were also updated
to their latest version.
Also removes a reference to `hack/make/.ensure-frozen-images`, which
was removed in ff91276d1f5beab5582d9ca582ee01af13198333.
The new busybox image has one layer less than the original,
so updated `TestBuildSquashParent` to take that into account.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 1ecd8ed5186a161c1c43ae7c99b1c81b97188619
Component: engine
2160e9bb7d