Jit: Raise program exception on floating point exceptions

This is done entirely through interpreter fallbacks. It would
probably be possible to implement this using host exception
handlers instead, but I think it would be a lot of complexity
for a rarely used feature, so let's not do it for now.

For performance reasons, there are two settings for this feature:
One setting which does enables just what True Crime: New York City
needs and one setting which enables it all. The latter makes
almost all float instructions fall back to the interpreter.

Source/Core/Core/NetPlayProto.h

@@ -58,6 +58,8 @@ struct NetSettings
   bool m_EFBEmulateFormatChanges;
   int m_SafeTextureCacheColorSamples;
   bool m_PerfQueriesEnable;
+  bool m_FloatExceptions;
+  bool m_DivideByZeroExceptions;
   bool m_FPRF;
   bool m_AccurateNaNs;
   bool m_DisableICache;