Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/DebugInfo/CodeView/CodeViewSymbols.def b/linux-x64/clang/include/llvm/DebugInfo/CodeView/CodeViewSymbols.def
index 41c5380..b5f1cc0 100644
--- a/linux-x64/clang/include/llvm/DebugInfo/CodeView/CodeViewSymbols.def
+++ b/linux-x64/clang/include/llvm/DebugInfo/CodeView/CodeViewSymbols.def
@@ -143,7 +143,6 @@
 CV_SYMBOL(S_MANMANYREG    , 0x1121)
 CV_SYMBOL(S_MANREGREL     , 0x1122)
 CV_SYMBOL(S_MANMANYREG2   , 0x1123)
-CV_SYMBOL(S_UNAMESPACE    , 0x1124)
 CV_SYMBOL(S_DATAREF       , 0x1126)
 CV_SYMBOL(S_ANNOTATIONREF , 0x1128)
 CV_SYMBOL(S_TOKENREF      , 0x1129)
@@ -255,6 +254,7 @@
 SYMBOL_RECORD(S_LTHREAD32     , 0x1112, ThreadLocalDataSym)
 SYMBOL_RECORD_ALIAS(S_GTHREAD32     , 0x1113, GlobalTLS, ThreadLocalDataSym)
 
+SYMBOL_RECORD(S_UNAMESPACE    , 0x1124, UsingNamespaceSym)
 
 #undef CV_SYMBOL
 #undef SYMBOL_RECORD