Update git submodules
- Update extensions/Cite from branch 'REL1_39' to a040f955698ef1cd965cda59d873f1f1d3c59860
- Localisation updates from https://translatewiki.net.
Change-Id: I75f497a236cfe81c0d112d100a55aa95a163f937
- Localisation updates from https://translatewiki.net.