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

lib/Object/ObjectFile.cpp

@@ -21,6 +21,8 @@
 using namespace llvm;
 using namespace object;
 
+void ObjectFile::anchor() { }
+
 ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec)
   : Binary(Type, source) {
 }