Bug 686274 - Increase the limit on the maximum size of array initializers (r=bhackett)

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extra : rebase_source : 1c2cb231b8f7ea58089b353654efc886ad244ad0
Bug 864587 - Avoid overflowing the stack on long if/else-if chains in asm.js (r=sstangl)

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extra : rebase_source : af47319af567ac1d6a86e67f95c5ac6d332b1713