[v8-test262-automation] Changes from https://github.com/v8/v8.git at sha f4a586f0 on Mon Nov 12 2018 18:57:21 GMT+0000 (Coordinated Universal Time)

[v8-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd