abseil-hello demo should use the client image from MinimalRootfs

the ci image here https://gitlab.com/celduin/buildstream-bazel/abseil-hello-fork/-/blob/master/.gitlab-ci.yml#L11 should be replaced with the client image https://gitlab.com/celduin/buildstream-bazel/minimal-rootfs/-/blob/master/.gitlab-ci.yml#L197

Edited Jul 24, 2020 by Darius Makovsky

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information