So far 'tests' and 'samples' directories were matched only when they
were first directories in path hierarchy. This doesn't work when running
sanitycheck from directory other than Zephyr source code root.
Match any directory in path hierarchy, similar how file is matched
currently. That way sanitycheck can be executed from outside of Zephyr
source code directory.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
