Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/DebugInfo/DIContext.h b/linux-x64/clang/include/llvm/DebugInfo/DIContext.h
index f89eb34..bbdd5e0 100644
--- a/linux-x64/clang/include/llvm/DebugInfo/DIContext.h
+++ b/linux-x64/clang/include/llvm/DebugInfo/DIContext.h
@@ -154,6 +154,8 @@
 struct DIDumpOptions {
   unsigned DumpType = DIDT_All;
   unsigned RecurseDepth = -1U;
+  uint16_t Version = 0; // DWARF version to assume when extracting.
+  uint8_t AddrSize = 4; // Address byte size to assume when extracting.
   bool ShowAddresses = true;
   bool ShowChildren = false;
   bool ShowParents = false;