Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Object/IRObjectFile.h b/linux-x64/clang/include/llvm/Object/IRObjectFile.h
index 6c271b1..993359b 100644
--- a/linux-x64/clang/include/llvm/Object/IRObjectFile.h
+++ b/linux-x64/clang/include/llvm/Object/IRObjectFile.h
@@ -50,11 +50,22 @@
     return v->isIR();
   }
 
-  /// \brief Finds and returns bitcode embedded in the given object file, or an
+  using module_iterator =
+      pointee_iterator<std::vector<std::unique_ptr<Module>>::const_iterator,
+                       const Module>;
+
+  module_iterator module_begin() const { return module_iterator(Mods.begin()); }
+  module_iterator module_end() const { return module_iterator(Mods.end()); }
+
+  iterator_range<module_iterator> modules() const {
+    return make_range(module_begin(), module_end());
+  }
+
+  /// Finds and returns bitcode embedded in the given object file, or an
   /// error code if not found.
   static Expected<MemoryBufferRef> findBitcodeInObject(const ObjectFile &Obj);
 
-  /// \brief Finds and returns bitcode in the given memory buffer (which may
+  /// Finds and returns bitcode in the given memory buffer (which may
   /// be either a bitcode file or a native object file with embedded bitcode),
   /// or an error code if not found.
   static Expected<MemoryBufferRef>