Bug 831370 - Rename IsAddressableGCThing to GetAddressableGCThing, now that it returns void* r=terrence

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extra : rebase_source : 9db61816fedf1e32d80814cbb231ec80f9904db5
Bug 831216 - GC: jsapi test GCFinalizeCallback fails under rooting analysis r=billm

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extra : rebase_source : a7d08a2cbf6d7046b694c06ad4ac54bb9dd93d7c
Bug 831291 - GC: jsapi test Debugger fails under rooting analysis r=billm

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extra : rebase_source : 5ee77ba14d8e9e68db2c16ba8767021f9ee959b5