[FIX] runbot: export diff_match_patch properly

The lib exports its data through the global object, an odoo module then
re-exports the module to make it available to other odoo modules.

runbot/__manifest__.py

@@ -64,6 +64,7 @@
     'assets': {
         'web.assets_backend': [
             'runbot/static/libs/diff_match_patch/diff_match_patch.js',
+            'runbot/static/src/diff_match_patch_module.js',
             'runbot/static/src/fields/*',
         ],
     },

runbot/static/libs/diff_match_patch/diff_match_patch.js

@@ -2235,7 +2235,7 @@ var diff_match_patch = function() {
   // /** @suppress {globalThis} */
   // this['DIFF_EQUAL'] = DIFF_EQUAL;
 
-export {
+(typeof window !== "undefined" ? window : this).DiffMatchPatch = {
   diff_match_patch,
   DIFF_DELETE,
   DIFF_INSERT,

runbot/static/src/diff_match_patch_module.js

@@ -0,0 +1,5 @@
+odoo.define("@runbot/diff_match_patch", [], function () {
+    'use strict';
+
+    return DiffMatchPatch;
+});

runbot/static/src/fields/tracking_value.js

@@ -1,7 +1,7 @@
 /** @odoo-module **/
 import { patch } from "@web/core/utils/patch";
 import { Message } from "@mail/core/common/message";
-import { diff_match_patch } from "@runbot/libs/diff_match_patch/diff_match_patch";
+import { diff_match_patch } from "@runbot/diff_match_patch";
 
 patch(Message.prototype, {
     setup() {