Switch all uses of LLVM_OVERRIDE to just use 'override' directly.

llvm-svn: 202625
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index a5c725d..165af30 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -1526,7 +1526,7 @@
   std::string Base;
 public:
   FilterNonExistent(std::string Base) : Base(Base) {}
-  bool operator()(const Multilib &M) const LLVM_OVERRIDE {
+  bool operator()(const Multilib &M) const override {
     return !llvm::sys::fs::exists(Base + M.gccSuffix() + "/crtbegin.o");
   }
 };