Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/clang-c/CXString.h b/linux-x64/clang/include/clang-c/CXString.h
index 68ab7bc..76eeda1 100644
--- a/linux-x64/clang/include/clang-c/CXString.h
+++ b/linux-x64/clang/include/clang-c/CXString.h
@@ -28,7 +28,7 @@
  */
 
 /**
- * \brief A character string.
+ * A character string.
  *
  * The \c CXString type is used to return strings from the interface when
  * the ownership of that string might differ from one call to the next.
@@ -46,17 +46,17 @@
 } CXStringSet;
 
 /**
- * \brief Retrieve the character data associated with the given string.
+ * Retrieve the character data associated with the given string.
  */
 CINDEX_LINKAGE const char *clang_getCString(CXString string);
 
 /**
- * \brief Free the given string.
+ * Free the given string.
  */
 CINDEX_LINKAGE void clang_disposeString(CXString string);
 
 /**
- * \brief Free the given string set.
+ * Free the given string set.
  */
 CINDEX_LINKAGE void clang_disposeStringSet(CXStringSet *set);