Update git submodules
- Update extensions/SpamBlacklist from branch 'REL1_39' to 855297c092afbc533c5771679174765b7415c994
- Localisation updates from https://translatewiki.net.
Change-Id: Id474d19a52caa69e44933db9baacbff405afdf80
- Localisation updates from https://translatewiki.net.