Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/CodeGen/PBQP/Solution.h b/linux-x64/clang/include/llvm/CodeGen/PBQP/Solution.h
index 6a24727..4d4379f 100644
--- a/linux-x64/clang/include/llvm/CodeGen/PBQP/Solution.h
+++ b/linux-x64/clang/include/llvm/CodeGen/PBQP/Solution.h
@@ -21,7 +21,7 @@
 namespace llvm {
 namespace PBQP {
 
-  /// \brief Represents a solution to a PBQP problem.
+  /// Represents a solution to a PBQP problem.
   ///
   /// To get the selection for each node in the problem use the getSelection method.
   class Solution {
@@ -30,17 +30,17 @@
     SelectionsMap selections;
 
   public:
-    /// \brief Initialise an empty solution.
+    /// Initialise an empty solution.
     Solution() = default;
 
-    /// \brief Set the selection for a given node.
+    /// Set the selection for a given node.
     /// @param nodeId Node id.
     /// @param selection Selection for nodeId.
     void setSelection(GraphBase::NodeId nodeId, unsigned selection) {
       selections[nodeId] = selection;
     }
 
-    /// \brief Get a node's selection.
+    /// Get a node's selection.
     /// @param nodeId Node id.
     /// @return The selection for nodeId;
     unsigned getSelection(GraphBase::NodeId nodeId) const {