Bug 892187 (part 0) - Fix busted GGC builds.  r=bhackett.

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extra : rebase_source : a4be26dc5bc99ea987e76023f437a64304001639
Bug 848146 - Do not need to SkipRoot inline assembler buffers, r=terrence

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extra : rebase_source : 7b0011ba3b5b2749d1b57eec635ec7ccb2d1bdad