bot_update: add /chrome-internal/trunk/src-internal to RECOGNIZED_PATHS

The script already contains references to chrome-internal, and when running
under remote_run we have no access to hacky build_internal checkout.

BUG=593999, 584079

Review-Url: https://codereview.chromium.org/2101573002

recipe_modules/bot_update/resources/bot_update.py

@@ -250,6 +250,8 @@ RECOGNIZED_PATHS = {
         CHROMIUM_SRC_URL,
     '/chrome/trunk/src/tools/cros.DEPS':
         CHROMIUM_GIT_HOST + '/chromium/src/tools/cros.DEPS.git',
+    '/chrome-internal/trunk/src-internal':
+        'https://chrome-internal.googlesource.com/chrome/src-internal.git',
 }
 RECOGNIZED_PATHS.update(internal_data.get('RECOGNIZED_PATHS', {}))