Update git submodules
- Update extensions/AbuseFilter from branch 'REL1_39' to b8ec3d18bc19c1e24126525b36d1b4bb602aa3c6
- Localisation updates from https://translatewiki.net.
Change-Id: I5a1942f6309a05000834f679127933e5e85ae09f
- Localisation updates from https://translatewiki.net.