Avoid spurious warning about hiding base class functions

cmdlinet::parse has a different signature and we don't override it here. As an
alternative option, we could rename functions.

Author: tautschnig

src/goto-cc/ms_cl_cmdline.h

@@ -33,6 +33,7 @@ class ms_cl_cmdlinet:public goto_cc_cmdlinet
   void process_cl_option(const std::string &s);
   void process_response_file(const std::string &file);
   void process_response_file_line(const std::string &line);
+  using cmdlinet::parse;
   bool parse(const std::vector<std::string> &);
 };
 

src/goto-cc/ms_link_cmdline.h

@@ -31,6 +31,7 @@ class ms_link_cmdlinet : public goto_cc_cmdlinet
   void process_link_option(const std::string &s);
   void process_response_file(const std::string &file);
   void process_response_file_line(const std::string &line);
+  using cmdlinet::parse;
   bool parse(const std::vector<std::string> &);
 };