Fix libClusterFuzz env vars. (#2435)
Fix libClusterFuzz env vars. (#2435)

bot/env.yaml does not exist in libClusterFuzz. Just set the ones we
need.
google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz