Bug 945222 - Update web-platform-tests expected data based on cedar run

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extra : histedit_source : 40075b321e1bcce34aaa15b00a4b9ba96b02d4b6
Bug 945222 - Fixes to expected manifest generation for multiple platforms

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extra : histedit_source : 0e392d867403c092c010000bba2c746b794cdc9b