Updated mediawiki/skins
Project: mediawiki/skins/chameleon  4ce501e4eaa931e8644d6440aa2cb6e94f98f91d

Update due to Bootstrap changes

Should be merged only after [0] and [1].

[0] https://gerrit.wikimedia.org/r/#/c/125678/
[1] https://gerrit.wikimedia.org/r/#/c/125363/

Change-Id: I0114eb982bc00ca4197be1348ac83fa6355e2ee6