Back out c209fea124e1 (bug 754198) because of Win64 build failure

config/elf-dynstr-gc.c

dom/plugins/test/testplugin/nptest.cpp

memory/jemalloc/jemalloc.c

modules/libmar/tool/mar.c

netwerk/test/TestProtocols.cpp

testing/mochitest/ssltunnel/ssltunnel.cpp

toolkit/xre/glxtest.cpp

widget/gtk2/nsAppShell.cpp

xpcom/base/MapsMemoryReporter.cpp

xpcom/base/nsCycleCollector.cpp

xpcom/threads/nsThread.cpp