[snapshot] Move builtins generation into mksnapshot

tools/verify_source_deps.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 """
 Script to print potentially missing source dependencies based on the actual
 .h and .cc files in the source tree and which files are included in the gyp
 and gn files. The latter inclusion is overapproximated.
 
@@ skipping 35 matching lines @@
   'tools',
   os.path.join('test', 'cctest'),
   os.path.join('test', 'common'),
   os.path.join('test', 'fuzzer'),
   os.path.join('test', 'unittests'),
   os.path.join('test', 'inspector'),
 ]
 
 GYP_UNSUPPORTED_FEATURES = [
   'gcmole',
+  'setup-isolate-deserialize.cc',
 ]
 
 GN_FILES = [
   os.path.join(V8_BASE, 'BUILD.gn'),
   os.path.join(V8_BASE, 'build', 'secondary', 'testing', 'gmock', 'BUILD.gn'),
   os.path.join(V8_BASE, 'build', 'secondary', 'testing', 'gtest', 'BUILD.gn'),
   os.path.join(V8_BASE, 'src', 'inspector', 'BUILD.gn'),
   os.path.join(V8_BASE, 'test', 'cctest', 'BUILD.gn'),
   os.path.join(V8_BASE, 'test', 'unittests', 'BUILD.gn'),
   os.path.join(V8_BASE, 'test', 'inspector', 'BUILD.gn'),
@@ skipping 106 matching lines @@
   for i in missing_gyp_files():
     print i
 
   print "\n----------- Files not in gn: -------------"
   for i in missing_gn_files():
     print i
   return 0
 
 if '__main__' == __name__:
   sys.exit(main())