Update git submodules
- Update extensions/OATHAuth from branch 'REL1_39' to 670163e8f8ebb56b4c4f882aad1e0ded7221cd87
- Localisation updates from https://translatewiki.net.
Change-Id: Ie0360fbea28e8ddedfa3b92cc7c06d8ba6e5d126
- Localisation updates from https://translatewiki.net.