Whitelist third_party/catapult/third_party/gsutil licence
Whitelist third_party/catapult/third_party/gsutil licence

This patch adds an exception to allow files in
third_party/catapult/third_party/gsutil to have the
'BSD MIT/X11 (BSD like)' and 'UNKNOWN' licences.

Note that third_party/catapult/third_party/gsutil is a copy of
tools/telemetry/third_party/gsutil, which already has this exception.
The folder was added here: https://codereview.chromium.org/1377933002.

Review URL: https://codereview.chromium.org/1412653004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355061}

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