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

llvm-svn: 202621
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
index 769bee5..637479b 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
@@ -47,10 +47,10 @@
     return getTM<SystemZTargetMachine>();
   }
 
-  virtual void addIRPasses() LLVM_OVERRIDE;
-  virtual bool addInstSelector() LLVM_OVERRIDE;
-  virtual bool addPreSched2() LLVM_OVERRIDE;
-  virtual bool addPreEmitPass() LLVM_OVERRIDE;
+  virtual void addIRPasses() override;
+  virtual bool addInstSelector() override;
+  virtual bool addPreSched2() override;
+  virtual bool addPreEmitPass() override;
 };
 } // end anonymous namespace