Move thread from test/ to util/thread/.

util/util.gyp

 # Copyright 2014 The Crashpad Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 121 matching lines @@
         'stdlib/strlcpy.cc',
         'stdlib/strlcpy.h',
         'stdlib/strnlen.cc',
         'stdlib/strnlen.h',
         'string/split_string.cc',
         'string/split_string.h',
         'synchronization/semaphore_mac.cc',
         'synchronization/semaphore_posix.cc',
         'synchronization/semaphore_win.cc',
         'synchronization/semaphore.h',
+        'thread/thread.cc',
+        'thread/thread.h',
         'thread/thread_log_messages.cc',
         'thread/thread_log_messages.h',
+        'thread/thread_posix.cc',
+        'thread/thread_win.cc',
         'win/address_types.h',
         'win/checked_win_address_range.h',
         'win/process_info.cc',
         'win/process_info.h',
         'win/process_structs.h',
         'win/scoped_handle.cc',
         'win/scoped_handle.h',
         'win/time.cc',
         'win/time.h',
       ],
@@ skipping 64 matching lines @@
             'libraries': [
               '-lrpcrt4.lib',
               '-lwinhttp.lib',
             ],
           },
         }],
       ],
     },
   ],
 }