[turbofan] Add support for eager/soft deoptimization reasons.

src/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 765 matching lines @@
         'debug/debug-evaluate.cc',
         'debug/debug-evaluate.h',
         'debug/debug-frames.cc',
         'debug/debug-frames.h',
         'debug/debug-scopes.cc',
         'debug/debug-scopes.h',
         'debug/debug.cc',
         'debug/debug.h',
         'debug/liveedit.cc',
         'debug/liveedit.h',
+        'deoptimize-reason.cc',
+        'deoptimize-reason.h',
         'deoptimizer.cc',
         'deoptimizer.h',
         'disasm.h',
         'disassembler.cc',
         'disassembler.h',
         'diy-fp.cc',
         'diy-fp.h',
         'double.h',
         'dtoa.cc',
         'dtoa.h',
@@ skipping 1514 matching lines @@
         }],
         ['want_separate_host_toolset==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],
         }],
       ],
     },
   ],
 }