codecov_helper.py: Filter out too-verbose lines from genhtml output

The output goes to the job log and it's getting quite large. At the same
time, don't use --quiet flag to genhtml, as per-run coverage stats printed
at the end are useful. So, just filter out lines which are too verbose to
have.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ia3b309dd55da86721ef96446a071827f959efe69
1 file changed