build: lib for the parser

lib_parser is new, its use by app and test

<description>

src/lib_parser/data/parser/cxx/CommentHandler.h

@@ -0,0 +1,23 @@
+#ifndef COMMENT_HANDLER_H
+#define COMMENT_HANDLER_H
+
+#include "clang/Lex/Preprocessor.h"
+
+class FileRegister;
+class ParserClient;
+
+class CommentHandler
+	: public clang::CommentHandler
+{
+public:
+	CommentHandler(ParserClient* client, FileRegister* fileRegister);
+	virtual ~CommentHandler();
+
+	virtual bool HandleComment(clang::Preprocessor& preprocessor, clang::SourceRange sourceRange);
+
+private:
+	ParserClient* m_client;
+	FileRegister* m_fileRegister;
+};
+
+#endif // COMMENT_HANDLER_H