add more descriptive comments to polyfill comments

qjs.c

@@ -99,7 +99,7 @@ static int eval_file(JSContext *ctx, const char *filename, int module)
     else
         eval_flags = JS_EVAL_TYPE_GLOBAL;
 
-    //POLYFILLS BEGIN 
+    //POLYFILLS FOR QJS FILES BEGIN 
     const char *pf = "globalThis.global = globalThis;\n"
         "global.console.error = console.log\n"
         "global.console.warn = console.log\n"
@@ -547,7 +547,7 @@ int main(int argc, char **argv)
             js_std_eval_binary(ctx, qjsc_repl, qjsc_repl_size, 0);
         }
 
-        //POLYFILLS BEGIN 
+        //POLYFILLS FOR QJS REPL BEGIN 
         const char *pf = "globalThis.global = globalThis;\n"
                  "global.console.error = console.log\n"
                  "global.console.warn = console.log\n"