CppTools: Fix parentheses mismatch

... when the ClangCodeModel is disabled.
The built-in highlighter's use of HighlightingResult::kind conflicted
with the ClangCodeModel's.
Amends d8c1e51bfe.

Change-Id: I79784679fd17d88cd543304de726f8576954b29c
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/cpptools/semantichighlighter.h

@@ -59,6 +59,8 @@ public:
         StringUse,
         FunctionDeclarationUse,
         VirtualFunctionDeclarationUse,
+        AngleBracketOpen,
+        AngleBracketClose,
     };
 
     using HighlightingRunner = std::function<QFuture<TextEditor::HighlightingResult> ()>;