Fixed threadpool hang and added lots of smoketests.
* Fixed bug in threadpool logic when calling CleanupAnyWorkersSharingAllocator - this was deleting the worker's thread death notifier in the context of a worker thread (which is only allowed from the context of the main thread).
* Added lots more smoketests
* Added --overwrite option to fzip (previously unzipping would always overwrite)
EXPORTS
_ZN17RLoggingAllocator7InstallEv @ 1 NONAME
_ZN17RLoggingAllocator9UninstallEv @ 2 NONAME
_ZN17RLoggingAllocator15StaticTraceFreeEP10RAllocatorPv @ 3 NONAME
_ZN17RLoggingAllocator16StaticTraceAllocEP10RAllocatorPvi @ 4 NONAME
_ZN17RLoggingAllocator7InstallEj @ 5 NONAME
_ZN17RLoggingAllocator3NewEjP10RAllocatorRPS_ @ 6 NONAME