Provide an empty virtual destructor to go with the virtual methods in

this class. Clang was warning on this with -Wnon-virtual-dtor.

llvm-svn: 128952

llvm/include/llvm/ExecutionEngine/RuntimeDyld.h

@@ -33,6 +33,7 @@ class RTDyldMemoryManager {
   void operator=(const RTDyldMemoryManager&);       // DO NOT IMPLEMENT
 public:
   RTDyldMemoryManager() {}
+  virtual ~RTDyldMemoryManager() {}
 
   // Allocate ActualSize bytes, or more, for the named function. Return
   // a pointer to the allocated memory and update Size to reflect how much