It seems a manual 'make' in the respective directories no longer
works, as always the default distro is used as upstream reference.
Let's work around this by adding DISTRO variable assignments to the
respective makefiles.
Change-Id: I8769d504ca7afde07d4a0ad1f03aaaec892bf576
It will be used by osmo-gsm-tester docker image right now, and at some
point in the future jenkins nodes will also migrate to it.
Change-Id: Ibfdec6007357a90212dea7d39300f04ce8ffdf65