Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  6693d0bd0599e7887e948e840c4e78fc7dd41602
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move reset.css to externals folder

Make it clear this file comes from outside the project

Change-Id: I7627a4f973b94a6e1d187af2e2656ec8c7ded4f9