Bug 890015 - Run test-masters.sh in parallel, r=Callek

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extra : rebase_source : 3b8f6e5f1fac44e2818da6a93663d54b0e21d711
Bug 916677 - Split up the linux64-haz build into variants the analyze just the JS shell vs the full browser, r=aki

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extra : rebase_source : 9b62d889dd7139fabc11324a90d9f99eeb4024b1