The following commit:
commit 407b49b35c (refs/bisect/bad)
Author: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Date: Wed Feb 12 15:00:46 2020 +0100
cmake: use find_package to locate Zephyr
breaks as we don't find the ZephyrUnittest package. For now revert to
the old means until a proper fix can be made.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>