[debugger] Add entire directory to files in .isolate

test/debugger/debugger.isolate

 # Copyright 2016 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'conditions': [
     ['v8_enable_inspector==1', {
       'variables': {
         'files': [
-          './debugger.status',
-          './protocol/',
-          './test-api.js',
-          './testcfg.py',
+          './',
         ],
       },
     }],
   ],
   'includes': [
     '../../src/d8.isolate',
     '../../tools/testrunner/testrunner.isolate',
   ],
-}
+}