phplint jobs for MediaWiki skins

Adds phplint jobs to:

mediawiki/skins/BlueSky
mediawiki/skins/BlueSpiceSkin
mediawiki/skins/CologneBlue
mediawiki/skins/Example
mediawiki/skins/GreyStuff
mediawiki/skins/Mask
mediawiki/skins/Modern
mediawiki/skins/MonoBook
mediawiki/skins/Nimbus
mediawiki/skins/Nostalgia
mediawiki/skins/Splash
mediawiki/skins/Truglass
mediawiki/skins/apex
mediawiki/skins/chameleon

Bug: 66926
Change-Id: I3ced08099f7283f75f61c170c291f7a80ee79a5b