Add 'pragma: no cover's to infra.libs.logs
Add 'pragma: no cover's to infra.libs.logs

It's not a problem for coverage currently, but future tests may (read: will)
expose this deficiency.

R=pgervais@chromium.org
BUG=463760

Review URL: https://codereview.chromium.org/976973002

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra