Update git submodules
- Update extensions/Echo from branch 'REL1_40' to 39fe6f9d051f1e6dc89400e2dbf287f523ab19fc
- Localisation updates from https://translatewiki.net.
Change-Id: Id117f72645e78ff244480381a74d38309729efe5
- Localisation updates from https://translatewiki.net.