Increase the coverage for the constructor for Intl.NumberFormat by
ensuring that HasProperty(O, Pk) is properly called.

[dynamic import] Fix async test to verify completion

Fixes #1829

[v8-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: 4ab8215e targetRevisionAtLastExport: 92143ed8

[v8-test262-automation] Changes from https://github.com/v8/v8.git at sha 4ab8215e on Thu Oct 04 2018 18:37:16 GMT+0000 (Coordinated Universal Time)

[javascriptcore-test262-automation] Updated curation log with latest revision sha's from export and changed files.
    sourceRevisionAtLastExport: 9dc12cff08 targetRevisionAtLastExport: bebaa21a

[javascriptcore-test262-automation] Changes from https://github.com/webkit/webkit.git at sha 9dc12cff08 on Thu Oct 04 2018 18:33:55 GMT+0000 (Coordinated Universal Time)