Add next_version_mini_installer to MiniInstallerTest's compile targets.

scripts/slave/recipes/chromium.expected/full_chromium_win_Win_x64_Builder.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 342 matching lines @@
       "--goma-jsonstatus",
       "/path/to/tmp/json",
       "--goma-service-account-json-file",
       "C:\\creds\\service_accounts\\service-account-goma-client.json",
       "--goma-dir",
       "[CACHE]\\cipd\\goma",
       "--ninja-ensure-up-to-date",
       "--",
       "browser_tests",
       "browser_tests_run",
-      "mini_installer"
+      "mini_installer",
+      "next_version_mini_installer"
     ],
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"
     },
     "name": "compile",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
       "@@@STEP_LOG_END@json.output (invalid)@@@"
     ]
   },
@@ skipping 106 matching lines @@
     "~followup_annotations": [
       "@@@STEP_TEXT@Win 7 Tests x64 (1)<br />Win10 Tests x64@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]