Use 'override/final' instead of 'virtual' for overridden methods

Summary:
The patch is generated using clang-tidy misc-use-override check.

This command was used:

  tools/clang/tools/extra/clang-tidy/tool/run-clang-tidy.py \
    -checks='-*,misc-use-override' -header-filter='llvm|clang' -j=32 -fix

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D8926

llvm-svn: 234678
diff --git a/clang/lib/Analysis/UninitializedValues.cpp b/clang/lib/Analysis/UninitializedValues.cpp
index 8a6870f..3c7bc4e 100644
--- a/clang/lib/Analysis/UninitializedValues.cpp
+++ b/clang/lib/Analysis/UninitializedValues.cpp
@@ -837,7 +837,7 @@
     : hadUse(numBlocks, false), hadAnyUse(false),
       currentBlock(0) {}
 
-  virtual ~PruneBlocksHandler() {}
+  ~PruneBlocksHandler() override {}
 
   /// Records if a CFGBlock had a potential use of an uninitialized variable.
   llvm::BitVector hadUse;