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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146959 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Mangle.cpp b/lib/AST/Mangle.cpp
index 5cb8f47..68e0098 100644
--- a/lib/AST/Mangle.cpp
+++ b/lib/AST/Mangle.cpp
@@ -59,6 +59,8 @@
 
 }
 
+void MangleContext::anchor() { }
+
 void MangleContext::mangleGlobalBlock(const BlockDecl *BD,
                                       raw_ostream &Out) {
   Out << "__block_global_" << getBlockId(BD, false);