Update git submodules
- Update extensions/Renameuser from branch 'REL1_39' to 37501932dff5193275f212b3004ea1789d4a92d2
- Localisation updates from https://translatewiki.net.
Change-Id: I67ed911afdb60965265f5ce5424d34b4c5487d1a
- Localisation updates from https://translatewiki.net.