findmissing: initdb_upstream: Don't log duplicate entries

When executing "git log" commands starting with a specific SHA, we often get
duplicates. Presumably this is because git history is not always linear across
merges.

Do not log this event as it just creates a lot of noise.

BUG=None
TEST=Run scripts on target

Change-Id: If4408b5974046b2613dce4a35640bbee63a5b94c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2189515
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
1 file changed