Update git submodules
- Update skins/MinervaNeue from branch 'REL1_39' to 5d0cfcf756cf6e3d3bff2efe23a8d0f95a89055a
- Localisation updates from https://translatewiki.net.
Change-Id: Id71a51698308edb5d9d074518332e8ff76dc4ece
- Localisation updates from https://translatewiki.net.