findmissing: initdb_chromeos: Reduce logging noise

When checking out and updating a branch we don't need to see git output
in the log unless there is an error. The branch name in question is
already logged. Silence git to reduce logging noise.

BUG=None
TEST=Run on GCE

Change-Id: Ib5c9ec2708262fbf119945d100778facd36c1ba6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2207525
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
1 file changed