Port the order_profiling GYP flag to GN

tools/cygprofile/cygprofile.gyp

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
+      # GN: //tools/cygprofile
       'target_name': 'cygprofile',
       'type': 'static_library',
       'include_dirs': [ '../..', ],
       'sources': [
         'cygprofile.cc',
         'cygprofile.h',
       ],
       'cflags!': [ '-finstrument-functions' ],
       'dependencies': [
         # This adds uninstrumented symbols to the static library from base.
         # These symbols are likely *not* to be used because there are many
         # other duplicates in other objects/libraries.
         '../../base/base.gyp:base',
       ],
     },
     {
+      # GN: //tools/cygprofile:cygprofile_unittests
       'target_name': 'cygprofile_unittests',
       'type': 'executable',
       'include_dirs': [ '../..', ],
       'sources': [
         'cygprofile_unittest.cc',
       ],
       'cflags!': [ '-finstrument-functions' ],
       # TODO(azarchs): Fix the underlying problem (crbug/485542)
       'ldflags': [ '-Wl,--no-fatal-warnings' ],
       'dependencies': [
         'cygprofile',
         '../../base/base.gyp:base',
         '../../testing/gtest.gyp:gtest',
       ],
     },
   ],
 }