Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  6dd79852b81dd93b4de0e985ef57f35cd71e910d

Add XML prolog to SVG files

Fix of  I37a6da620157b9254cdc44eca8b7bd482491e916, see bug 59234
and Ic9fdd081003b694dbd7e413ca25fffe782b912b5 for background.
Fix was done using the script from that commit.

Change-Id: Ic5084f09376ce8107b91cb5651f465958361368a