[C++11] Replace LLVM_OVERRIDE with 'override'

llvm-svn: 202632
diff --git a/clang-tools-extra/unittests/clang-tidy/ClangTidyTest.h b/clang-tools-extra/unittests/clang-tidy/ClangTidyTest.h
index 1be5f82..71201db 100644
--- a/clang-tools-extra/unittests/clang-tidy/ClangTidyTest.h
+++ b/clang-tools-extra/unittests/clang-tidy/ClangTidyTest.h
@@ -29,7 +29,7 @@
 
 private:
   bool BeginSourceFileAction(CompilerInstance &Compiler,
-                             llvm::StringRef file_name) LLVM_OVERRIDE {
+                             llvm::StringRef file_name) override {
     Context->setSourceManager(&Compiler.getSourceManager());
     Check.registerPPCallbacks(Compiler);
     return true;