Update git submodules
Update git submodules

* Update scripts/i18n from branch 'master'
  to b7c613546714488092051ef43170e654d671462a
  - Localisation updates from https://translatewiki.net.
    
    Change-Id: I411d4049b90e9f91bd2c91b2a06709d9fc62760b
    
wikimedia/pywikibot-core,wikimedia/pywikibot-core