always use require(./stdlib/list) instead of require(./stdlib/list.js)

Author: bobzhang

jscomp/js_dump.ml

@@ -1420,6 +1420,7 @@ let pp_program (program : J.program) (f : Ext_pp.t) =
        begin match Sys.getenv "OCAML_AMD_MODULE" with 
          | exception Not_found -> 
            ignore (node_program f program)
+           (* amd_program f program *)
          | _ -> amd_program f program
        end ) ;
     P.newline f ;

jscomp/js_program_loader.ml

@@ -39,9 +39,9 @@ let string_of_module_id (x : module_id) : string =
         ->  
         let target = String.uncapitalize file in
         if String_set.mem target Js_config.runtime_set   then
-          "./runtime/" ^ target
+          "./runtime/" ^ Filename.chop_extension target
         else
-          "./stdlib/" ^ target 
+          "./stdlib/" ^ Filename.chop_extension target 
       | NodeJS -> 
         if Ext_string.starts_with id.name "Caml_" then 
           let path =