Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/IR/ProfileSummary.h b/linux-x64/clang/include/llvm/IR/ProfileSummary.h
index d85ce8c..e386637 100644
--- a/linux-x64/clang/include/llvm/IR/ProfileSummary.h
+++ b/linux-x64/clang/include/llvm/IR/ProfileSummary.h
@@ -51,7 +51,7 @@
   SummaryEntryVector DetailedSummary;
   uint64_t TotalCount, MaxCount, MaxInternalCount, MaxFunctionCount;
   uint32_t NumCounts, NumFunctions;
-  /// \brief Return detailed summary as metadata.
+  /// Return detailed summary as metadata.
   Metadata *getDetailedSummaryMD(LLVMContext &Context);
 
 public:
@@ -67,9 +67,9 @@
         NumCounts(NumCounts), NumFunctions(NumFunctions) {}
 
   Kind getKind() const { return PSK; }
-  /// \brief Return summary information as metadata.
+  /// Return summary information as metadata.
   Metadata *getMD(LLVMContext &Context);
-  /// \brief Construct profile summary from metdata.
+  /// Construct profile summary from metdata.
   static ProfileSummary *getFromMD(Metadata *MD);
   SummaryEntryVector &getDetailedSummary() { return DetailedSummary; }
   uint32_t getNumFunctions() { return NumFunctions; }