Update git submodules
- Update extensions/ReplaceText from branch 'REL1_40' to a6add7b3a0af44a8ae959a8ab2d2b2b28e5d3612
- Localisation updates from https://translatewiki.net.
Change-Id: I00796edeeb0a9c0e398a5b1916db0b2c8f46fe15
- Localisation updates from https://translatewiki.net.