message: Add a missing return statement to the default implementation of FixupReference.
  This is supposed to be a sucessful no-op everywhere but in Swift.
  <rdar://problem/47402084>
diff: @@ -107,7 +107,9 @@ public:
  /// This allows a language runtime to adjust references depending on the type.
  /// \return true on success.
  - virtual bool FixupReference(lldb::addr_t &addr, CompilerType type) {}
  + virtual bool FixupReference(lldb::addr_t &addr, CompilerType type) {
  + return true;
  + }
  virtual void SetExceptionBreakpoints() {}
  