Update git submodules
- Update extensions/Math from branch 'REL1_40' to 8b06111055236d0eb215f2796116eb15d721b65e
- Localisation updates from https://translatewiki.net.
Change-Id: Ie1b49bb0587295aa2167c4dbac55f068f9fdcd06
- Localisation updates from https://translatewiki.net.