Use iossim/test-without-building for Earlgrey tests.

scripts/slave/recipes/ios/unified_builder_tester.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 DEPS = [
   'ios',
   'recipe_engine/platform',
   'recipe_engine/properties',
 ]
 
@@ skipping 36 matching lines @@
         },
         {
           'app': 'fake tests 2',
           'device type': 'fake device',
           'os': '7.1',
         },
         {
           'app': 'fake_eg_test_host',
           'device type': 'fake device 3',
           'os': '9.3',
-          'xctest': True,
+          'xctest': 'fake_eg_test',
         },
       ],
     })
   )
 
   yield (
     api.test('no_tests')
     + api.platform('mac', 64)
     + api.properties(
       buildername='ios',
@@ skipping 176 matching lines @@
     )
     + api.step_data(
       'fake tests 3 (fake device iOS 8.1)',
       retcode=1
     )
     + api.step_data(
       'fake tests 5 (fake device iOS 8.1)',
       retcode=2
     )
   )