Update VE core submodule to master (cc6e87c)

New changes:
52a5c2c Localisation updates from https://translatewiki.net.
10fd54b Localisation updates from https://translatewiki.net.
30c1a3d generateDocs.sh: Simplify
e2cb3c1 Localisation updates from https://translatewiki.net.
cc6e87c Fix command help for CTRL+1-6 on mac

Change-Id: I12787f3f38467dce10458342ac0d586902575d02