Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/CodeGen/MachineLoopInfo.h b/linux-x64/clang/include/llvm/CodeGen/MachineLoopInfo.h
index 104655e..917fb90 100644
--- a/linux-x64/clang/include/llvm/CodeGen/MachineLoopInfo.h
+++ b/linux-x64/clang/include/llvm/CodeGen/MachineLoopInfo.h
@@ -54,7 +54,7 @@
   /// that contains the header.
   MachineBasicBlock *getBottomBlock();
 
-  /// \brief Find the block that contains the loop control variable and the
+  /// Find the block that contains the loop control variable and the
   /// loop test. This will return the latch block if it's one of the exiting
   /// blocks. Otherwise, return the exiting block. Return 'null' when
   /// multiple exiting blocks are present.
@@ -97,7 +97,7 @@
 
   LoopInfoBase<MachineBasicBlock, MachineLoop>& getBase() { return LI; }
 
-  /// \brief Find the block that either is the loop preheader, or could
+  /// Find the block that either is the loop preheader, or could
   /// speculatively be used as the preheader. This is e.g. useful to place
   /// loop setup code. Code that cannot be speculated should not be placed
   /// here. SpeculativePreheader is controlling whether it also tries to