Bug 1519536 - Fix rustdoc reference. r=kvark
Bug 1519536 - Fix rustdoc reference. r=kvark

Depends on D16358

Differential Revision: https://phabricator.services.mozilla.com/D16359

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/8503109f1a48ab9a4cd3a215b6673d9c6b773303

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