Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Object/MachOUniversal.h b/linux-x64/clang/include/llvm/Object/MachOUniversal.h
index 72837d0..9e70b0b 100644
--- a/linux-x64/clang/include/llvm/Object/MachOUniversal.h
+++ b/linux-x64/clang/include/llvm/Object/MachOUniversal.h
@@ -34,9 +34,9 @@
 public:
   class ObjectForArch {
     const MachOUniversalBinary *Parent;
-    /// \brief Index of object in the universal binary.
+    /// Index of object in the universal binary.
     uint32_t Index;
-    /// \brief Descriptor of the object.
+    /// Descriptor of the object.
     MachO::fat_arch Header;
     MachO::fat_arch_64 Header64;