[snapshot] Move builtins generation into mksnapshot

test/cctest/cctest.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 104 matching lines @@
       'libsampler/test-sampler.cc',
       'parsing/test-parse-decision.cc',
       'parsing/test-preparser.cc',
       'parsing/test-scanner-streams.cc',
       'parsing/test-scanner.cc',
       'print-extension.cc',
       'print-extension.h',
       'profiler-extension.cc',
       'profiler-extension.h',
       'scope-test-helper.h',
+      'setup-isolate-for-tests.cc',
+      'setup-isolate-for-tests.h',
       'test-access-checks.cc',
       'test-accessor-assembler.cc',
       'test-accessors.cc',
       'test-api.cc',
       'test-api.h',
       'test-api-accessors.cc',
       'test-api-interceptors.cc',
       'test-array-list.cc',
       'test-ast.cc',
       'test-atomicops.cc',
@@ skipping 388 matching lines @@
             '../../gypfiles/isolate.gypi',
           ],
           'sources': [
             'cctest.isolate',
           ],
         },
       ],
     }],
   ],
 }