Backed out changeset 2d6c5cbcc213 (bug 902587) for failures during linking on a CLOSED TREE

--HG--
rename : xpcom/build/PoisonIOInterposer.h => xpcom/build/mozPoisonWrite.h
rename : xpcom/build/PoisonIOInterposerBase.cpp => xpcom/build/mozPoisonWriteBase.cpp
rename : xpcom/build/PoisonIOInterposerMac.cpp => xpcom/build/mozPoisonWriteMac.cpp
rename : xpcom/build/PoisonIOInterposerWin.cpp => xpcom/build/mozPoisonWriteWin.cpp