Add stub version of unwind support


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9789 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.h b/lib/ExecutionEngine/Interpreter/Interpreter.h
index 974aea8..04baf36 100644
--- a/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -125,6 +125,7 @@
   void visitCallSite(CallSite CS);
   void visitCallInst(CallInst &I) { visitCallSite (CallSite (&I)); }
   void visitInvokeInst(InvokeInst &I) { visitCallSite (CallSite (&I)); }
+  void visitUnwindInst(UnwindInst &I);
 
   void visitShl(ShiftInst &I);
   void visitShr(ShiftInst &I);