[gn] Move build to gypfiles

test/unittests/unittests.gyp

 # Copyright 2014 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.
 
 {
   'variables': {
     'v8_code': 1,
   },
-  'includes': ['../../build/toolchain.gypi', '../../build/features.gypi'],
+  'includes': ['../../gypfiles/toolchain.gypi', '../../gypfiles/features.gypi'],
   'targets': [
     {
       'target_name': 'unittests',
       'type': 'executable',
       'variables': {
         'optimize': 'max',
       },
       'dependencies': [
         '../../testing/gmock.gyp:gmock',
         '../../testing/gtest.gyp:gtest',
@@ skipping 184 matching lines @@
   'conditions': [
     ['test_isolation_mode != "noop"', {
       'targets': [
         {
           'target_name': 'unittests_run',
           'type': 'none',
           'dependencies': [
             'unittests',
           ],
           'includes': [
-            '../../build/isolate.gypi',
+            '../../gypfiles/isolate.gypi',
           ],
           'sources': [
             'unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }