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

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 -format

http://reviews.llvm.org/D8925

llvm-svn: 234679
diff --git a/llvm/lib/CodeGen/WinEHPrepare.cpp b/llvm/lib/CodeGen/WinEHPrepare.cpp
index 6f8c905..e5e6f25 100644
--- a/llvm/lib/CodeGen/WinEHPrepare.cpp
+++ b/llvm/lib/CodeGen/WinEHPrepare.cpp
@@ -136,9 +136,9 @@
 public:
   WinEHFrameVariableMaterializer(Function *OutlinedFn,
                                  FrameVarInfoMap &FrameVarInfo);
-  ~WinEHFrameVariableMaterializer() {}
+  ~WinEHFrameVariableMaterializer() override {}
 
-  virtual Value *materializeValueFor(Value *V) override;
+  Value *materializeValueFor(Value *V) override;
 
   void escapeCatchObject(Value *V);