fix iso c++ warning on const char*

src/actsim_agent/worker.cpp

@@ -262,7 +262,8 @@ std::unique_ptr<OutputType> Worker::perform_task(std::unique_ptr<InputType>& tas
         // I warned you about the syscall handling. A lot of error checks...
 
         // build the execution vector
-        char* const argv[] = {"${ACT_HOME}/bin/actsim", design_char, top_proc_char};
+        char bin[] = "${ACT_HOME}/bin/actsim";
+        char* const argv[] = {bin, design_char, top_proc_char};
 
         // and call actsim
         execv(argv[0], argv);