Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Support/GraphWriter.h b/linux-x64/clang/include/llvm/Support/GraphWriter.h
index 3df5c86..c9a9f40 100644
--- a/linux-x64/clang/include/llvm/Support/GraphWriter.h
+++ b/linux-x64/clang/include/llvm/Support/GraphWriter.h
@@ -41,7 +41,7 @@
 
 std::string EscapeString(const std::string &Label);
 
-/// \brief Get a color string for this node number. Simply round-robin selects
+/// Get a color string for this node number. Simply round-robin selects
 /// from a reasonable number of colors.
 StringRef getColorString(unsigned NodeNumber);