Add snapshot compression support into d8.

SConstruct

 # Copyright 2011 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 789 matching lines @@
     },
     'os:openbsd': {
       'LIBS': ['pthread'],
     },
     'os:win32': {
       'LIBS': ['winmm', 'ws2_32'],
     },
     'arch:arm': {
       'LINKFLAGS':   ARM_LINK_FLAGS
     },
+    'compress_startup_data:bz2': {
+      'CPPDEFINES':   ['COMPRESS_STARTUP_DATA_BZ2'],
+      'os:linux': {
+        'LIBS': ['bz2']
+      }
+    }
   },
   'msvc': {
     'all': {
       'LIBS': ['winmm', 'ws2_32']
     }
   }
 }
 
 
 SUFFIXES = {
@@ skipping 649 matching lines @@
 # version of scons.  Also, there's a bug in some revisions that
 # doesn't allow this flag to be set, so we swallow any exceptions.
 # Lovely.
 try:
   SetOption('warn', 'no-deprecated')
 except:
   pass
 
 
 Build()