[llvm] r287355 - [DebugInfo] Fix some Clang-tidy modernize-use-default, modernize-use-equal-delete and Include What You Use warnings; other minor fixes (NFC).

[Malcolm Parsons via llvm-commits]

On 18 November 2016 at 18:00, Eugene Zelenko via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> -  virtual ~WritableStream() {}
> +  ~WritableStream() override = default;

This declaration does nothing.
Should clang-tidy remove it?

-- 
Malcolm Parsons