Bug 907358 - Exactly root internal pointers in Array.join; r=Waldo

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extra : rebase_source : c7f0c4dfd9a1ac7f7877e1cbe0778ac0f071e9d4
Bug 907791 - Suppress some AsmJS rooting non-hazards in the static analysis; r=bhackett

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extra : rebase_source : 4c4e371427aeb07cdf3fb478e10810204e1ece8c
Bug 906241 - Trigger post barriers for writes to tenured call objects; r=bhackett