Update git submodules
- Update extensions/VisualEditor from branch 'REL1_40' to 70a4cd23f835bbf974d3c342e4322057ac685b81
- Localisation updates from https://translatewiki.net.
Change-Id: I253b20056644f6e07c72a91b69d5773c78120d1d
- Localisation updates from https://translatewiki.net.