[v8-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: 4a395137 targetRevisionAtLastExport: 07b31310

[v8-test262-automation] Changes from https://github.com/v8/v8.git at sha 4a395137 on Tue Dec 04 2018 19:12:32 GMT+0000 (Coordinated Universal Time)