Fix exception with clank revision parsing. (#800)
Fix exception with clank revision parsing. (#800)

None job type does not work since REVISION_VARS_URL is already
overwritten by job environment on bot. So, unable to fetch default
vars url to get chromium revision. Hardcode for now.
google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz