Update git submodules
- Update extensions/ConfirmEdit from branch 'REL1_39' to a6af3ccf4260b65a4fac4cd86a25e0c50c6f6305
- Localisation updates from https://translatewiki.net.
Change-Id: I6d3cd7a4176af9068ab242a85ac6fea3222eedca
- Localisation updates from https://translatewiki.net.