Updated mediawiki/extensions
Project: mediawiki/extensions/Scribunto  fddf05c0566aca35bc10b0b8fa4abed8668b7134
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Make our loader work like Lua's built-in loaders

Our loader for lua files distributed with the extension doesn't work
like Lua's built-in loaders. Fix that.

Change-Id: I7576f0e173c10a589f7ebf2c121230ed66b538fe