Update to LLVM 3.5a.

Change-Id: Ifadecab779f128e62e430c2b4f6ddd84953ed617
diff --git a/lib/CodeGen/ErlangGC.cpp b/lib/CodeGen/ErlangGC.cpp
index 8a1e2d9..e976d7f 100644
--- a/lib/CodeGen/ErlangGC.cpp
+++ b/lib/CodeGen/ErlangGC.cpp
@@ -32,7 +32,7 @@
                           DebugLoc DL) const;
   public:
     ErlangGC();
-    bool findCustomSafePoints(GCFunctionInfo &FI, MachineFunction &MF);
+    bool findCustomSafePoints(GCFunctionInfo &FI, MachineFunction &MF) override;
   };
 
 }