Update symlinks for notcirrus

Change-Id: I4f087af52bf6c9194224d394700111d1f60000c0
Enable the VE Math plugin by default on mediawikiwiki

This sets the VE Math BetaFeature to be enabled by default on
mediawikiwiki, and hides it because we're generally not supposed
to have BFs that are enabled by default.

Change-Id: I1dec0ff54165ff004a036ab9b807dca57eac0ae7
Merge "Enable the VE Math plugin by default on mediawikiwiki"
Merge "Update symlinks for notcirrus"