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

llvm-svn: 146960
diff --git a/llvm/lib/VMCore/Function.cpp b/llvm/lib/VMCore/Function.cpp
index bb8f62a..8238f63 100644
--- a/llvm/lib/VMCore/Function.cpp
+++ b/llvm/lib/VMCore/Function.cpp
@@ -39,6 +39,8 @@
 // Argument Implementation
 //===----------------------------------------------------------------------===//
 
+void Argument::anchor() { }
+
 Argument::Argument(Type *Ty, const Twine &Name, Function *Par)
   : Value(Ty, Value::ArgumentVal) {
   Parent = 0;