Update git submodules
- Update extensions/Interwiki from branch 'REL1_39' to a85b903cb18e5eb582a113efd21271f18e3f44e3
- Localisation updates from https://translatewiki.net.
Change-Id: I2ef3a83b28e883bf123f9b8e11ce9f99e533b290
- Localisation updates from https://translatewiki.net.