Update git submodules
- Update extensions/AbuseFilter from branch 'REL1_39' to 5cd6483a263e3b3fe6a36131cc75d93004f9bccd
- Localisation updates from https://translatewiki.net.
Change-Id: Ie58b55af89a5bbc2a32b4b3da5afea7c4a760cfd
- Localisation updates from https://translatewiki.net.