Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h b/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
index c73adc3..078c4b2 100644
--- a/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
+++ b/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
@@ -38,7 +38,7 @@
 /// this funciton and the parser will use this function to construct a list if
 /// it is missing.
 void guessSuccessors(const MachineBasicBlock &MBB,
-                     SmallVectorImpl<MachineBasicBlock*> &Successors,
+                     SmallVectorImpl<MachineBasicBlock*> &Result,
                      bool &IsFallthrough);
 
 } // end namespace llvm