Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/Support/ScopedPrinter.h b/linux-x64/clang/include/llvm/Support/ScopedPrinter.h
index 062439b..34c1a28 100644
--- a/linux-x64/clang/include/llvm/Support/ScopedPrinter.h
+++ b/linux-x64/clang/include/llvm/Support/ScopedPrinter.h
@@ -138,7 +138,7 @@
       }
     }
 
-    llvm::sort(SetFlags.begin(), SetFlags.end(), &flagName<TFlag>);
+    llvm::sort(SetFlags, &flagName<TFlag>);
 
     startLine() << Label << " [ (" << hex(Value) << ")\n";
     for (const auto &Flag : SetFlags) {