[v8-test262-automation] Updated curation log with latest revision sha's from...

[v8-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: 1fc8452b targetRevisionAtLastExport: 603acd9ca0

implementation-contributed/curation_logs/v8.json

 {
-  "sourceRevisionAtLastExport": "1fc8452b",
-  "targetRevisionAtLastExport": "603acd9ca0",
+  "sourceRevisionAtLastExport": "0039b340",
+  "targetRevisionAtLastExport": "6ddea08809",
   "curatedFiles": {}
 }
\ No newline at end of file