Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

llvm-svn: 146960
diff --git a/llvm/tools/bugpoint/ToolRunner.h b/llvm/tools/bugpoint/ToolRunner.h
index cfa8acf..7b93394 100644
--- a/llvm/tools/bugpoint/ToolRunner.h
+++ b/llvm/tools/bugpoint/ToolRunner.h
@@ -86,6 +86,7 @@
 /// complexity behind a simple interface.
 ///
 class AbstractInterpreter {
+  virtual void anchor();
 public:
   static CBE *createCBE(const char *Argv0, std::string &Message,
                         const std::string              &GCCBinary,