Bug 950923 - Fix an exact rooting hazard in GlobalObject::getIntrinsicValue; r=sfink

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extra : rebase_source : f49223dbfb97147d43bbf3720098b97e516c406a
Bug 950950 - Fix some exact rooting hazards in the bytecode emitter; r=sfink

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extra : rebase_source : a316b1cf10c7a251ef04fb0c3526a5320d40661e