Updated mediawiki/extensions
Project: mediawiki/extensions/ExtensionDistributor  89d5af8c71948910a565c91a8af0bb1fb588e2fd
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Rewrite ExtensionDistributor to no longer require working copies

    Instead, allow it to fetch tars from remote services (such as github)
    that allow us to generate tar snapshots per-branch

Change-Id: I9d3c328f1994d13f9c17b6e17b68f6b964c211aa