Fix analyzer TypeAttributeImpl::anchor() override.

TypeAttributeImpl inherits from EnumAttributeImpl which already defines anchor() as a virtual, so we should override this instead of redeclaring it.

llvm-svn: 372877

llvm/lib/IR/AttributeImpl.h

@@ -159,7 +159,7 @@ public:
 };
 
 class TypeAttributeImpl : public EnumAttributeImpl {
-  virtual void anchor();
+  void anchor() override;
 
   Type *Ty;