Add tcmalloc to GN build

third_party/tcmalloc/tcmalloc_sources.gypi

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'sources': [
     # gperftools/src/
     'gperftools/src/addressmap-inl.h',
     'gperftools/src/central_freelist.cc',
     'gperftools/src/central_freelist.h',
     'gperftools/src/common.cc',
     'gperftools/src/common.h',
     'gperftools/src/config_for_unittests.h',
-    'gperftools/src/config.h',
-    'gperftools/src/config.h.in',
     'gperftools/src/debugallocation.cc',
     'gperftools/src/emergency_malloc.cc',
     'gperftools/src/emergency_malloc_for_stacktrace.cc',
     'gperftools/src/emergency_malloc.h',
     'gperftools/src/fake_stacktrace_scope.cc',
     'gperftools/src/getenv_safe.h',
     'gperftools/src/getpc.h',
     'gperftools/src/heap-checker-bcad.cc',
     'gperftools/src/heap-checker.cc',
     'gperftools/src/heap-profiler.cc',
@@ skipping 119 matching lines @@
 
     # gperftools/src/gperftools/
     'gperftools/src/gperftools/heap-checker.h',
     'gperftools/src/gperftools/heap-profiler.h',
     'gperftools/src/gperftools/malloc_extension_c.h',
     'gperftools/src/gperftools/malloc_extension.h',
     'gperftools/src/gperftools/malloc_hook_c.h',
     'gperftools/src/gperftools/malloc_hook.h',
     'gperftools/src/gperftools/profiler.h',
     'gperftools/src/gperftools/stacktrace.h',
-    'gperftools/src/gperftools/tcmalloc.h',
-    'gperftools/src/gperftools/tcmalloc.h.in',
 
     # gperftools/src/third_party/
     'gperftools/src/third_party/valgrind.h',
   ],
 }