Update git submodules
- Update skins/MonoBook from branch 'REL1_39' to 0e12e1dfadbdf9cfcff93152c3483049637d48ff
- Localisation updates from https://translatewiki.net.
Change-Id: I5343d90aad085fda0bfcdece0733b5a39db52a29
- Localisation updates from https://translatewiki.net.