Clang: Properly handle Q_PROPERTY in TokenInfo

Transform Q_PROPERTY into unique AST node.
Mark different parts with types and search for parent
in FullTokenInfos.

Change-Id: Iaa1ec0c73d34773edf5605d3682bd6a290d195de
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/tools/clangbackend/source/sourcelocation.h

@@ -40,6 +40,7 @@ class SourceLocation
     friend class SourceRange;
     friend class TranslationUnit;
     friend class Cursor;
+    friend class FullTokenInfo;
     friend bool operator==(const SourceLocation &first, const SourceLocation &second);
 
 public: