Runtime: adjust runtime for 5.0

Author: hhugo

runtime/js/runtime_events.js

@@ -1,14 +1,17 @@
 //Provides: caml_custom_event_index
+//Version: >= 5.1
 var caml_custom_event_index = 0;
 
 //Provides: caml_runtime_events_user_register
 //Requires: caml_custom_event_index
+//Version: >= 5.1
 function caml_runtime_events_user_register(event_name, event_tag, event_type) {
   caml_custom_event_index += 1;
   return [0, caml_custom_event_index, event_name, event_type, event_tag];
 }
 
 //Provides: caml_runtime_events_user_write
+//Version: >= 5.1
 function caml_runtime_events_user_write(event, event_content) {
   return 0;
 }

runtime/js/sys.js

@@ -365,6 +365,7 @@ function caml_xdg_defaults(_unit) {
 
 //Provides: caml_sys_is_regular_file
 //Requires: resolve_fs_device
+//Version: >= 5.1
 function caml_sys_is_regular_file(name) {
   var root = resolve_fs_device(name);
   return root.device.isFile(root.rest);