Fix vulkan build

src/gpu/vk/GrVkBuffer.h

Index: src/gpu/vk/GrVkBuffer.h
diff --git a/src/gpu/vk/GrVkBuffer.h b/src/gpu/vk/GrVkBuffer.h
index bb529b3f7366dda79a4ce34210ceca0bb9969fb4..473a837646efcb6a5ebcabdd2224d76ab26244e9 100644
--- a/src/gpu/vk/GrVkBuffer.h
+++ b/src/gpu/vk/GrVkBuffer.h
@@ -20,7 +20,7 @@ class GrVkGpu;
  */
 class GrVkBuffer : public SkNoncopyable {
 public:
-    ~GrVkBuffer() {
+    virtual ~GrVkBuffer() {
         // either release or abandon should have been called by the owner of this object.
         SkASSERT(!fResource);
     }