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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146960 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/MCJIT/MCJITMemoryManager.h b/lib/ExecutionEngine/MCJIT/MCJITMemoryManager.h
index 58f9100..bc7080d 100644
--- a/lib/ExecutionEngine/MCJIT/MCJITMemoryManager.h
+++ b/lib/ExecutionEngine/MCJIT/MCJITMemoryManager.h
@@ -21,6 +21,7 @@
 // and the RuntimeDyld interface that maps objects, by name, onto their
 // matching LLVM IR counterparts in the module(s) being compiled.
 class MCJITMemoryManager : public RTDyldMemoryManager {
+  virtual void anchor();
   JITMemoryManager *JMM;
 
   // FIXME: Multiple modules.