Suicides tracing (#1688)

* tracing suicide

* fixed #1635

* fixed typo

ethcore/src/externalities.rs

@@ -263,6 +263,7 @@ impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMT
 			self.state.transfer_balance(&address, refund_address, &balance);
 		}
 
+		self.tracer.trace_suicide(address, balance, refund_address.clone(), self.depth + 1);
 		self.substate.suicides.insert(address);
 	}