lava_helper/codecov_helper.py: Update artifact d/l paths after recent refactor

Make sure they're still downloaded to a single target dir, where the rest of
code expects them.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I3ab91d3c3f4238c7c0c2fabbd11c7ffd753b64fa
1 file changed