Move *BSD and Solaris Sampler implementations into sampler.cc

tools/gyp/v8.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 429 matching lines @@
             '../../src/regexp-stack.cc',
             '../../src/regexp-stack.h',
             '../../src/rewriter.cc',
             '../../src/rewriter.h',
             '../../src/runtime-profiler.cc',
             '../../src/runtime-profiler.h',
             '../../src/runtime.cc',
             '../../src/runtime.h',
             '../../src/safepoint-table.cc',
             '../../src/safepoint-table.h',
+            '../../src/sampler.cc',
+            '../../src/sampler.h',
             '../../src/scanner-character-streams.cc',
             '../../src/scanner-character-streams.h',
             '../../src/scanner.cc',
             '../../src/scanner.h',
             '../../src/scopeinfo.cc',
             '../../src/scopeinfo.h',
             '../../src/scopes.cc',
             '../../src/scopes.h',
             '../../src/serialize.cc',
             '../../src/serialize.h',
@@ skipping 549 matching lines @@
             }],
           ],
           'dependencies': [
             'v8'
           ],
         },
       ],
     }],
   ],
 }