Add 'quiet' flag to testcase upload. (#946)
Add 'quiet' flag to testcase upload. (#946)

When set, don't post the 'ClusterFuzz is analyzing your testcase...'
comment.
google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz