Delete the simulator when we don't need it anymore

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index efce887c2e6d4e5f7ef21e07246b1118114ec6de..d26499bbc5db087fd8ac6c4597a2412a2173290c 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -925,6 +925,10 @@ Simulator::Simulator(Isolate* isolate) : isolate_(isolate) {
 }
 
 
+Simulator::~Simulator() {
+}
+
+
 // When the generated code calls an external reference we need to catch that in
 // the simulator.  The external reference will be a function compiled for the
 // host architecture.  We need to call that function instead of trying to