Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/Support/CodeGen.h b/linux-x64/clang/include/llvm/Support/CodeGen.h
index 5f9e331..ce3a623 100644
--- a/linux-x64/clang/include/llvm/Support/CodeGen.h
+++ b/linux-x64/clang/include/llvm/Support/CodeGen.h
@@ -25,7 +25,7 @@
   // Code model types.
   namespace CodeModel {
     // Sync changes with CodeGenCWrappers.h.
-  enum Model { Small, Kernel, Medium, Large };
+  enum Model { Tiny, Small, Kernel, Medium, Large };
   }
 
   namespace PICLevel {