Fixed SConscript to allow both mode=debug and objectprint=on to be specified...

src/SConscript

 # 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 74 matching lines @@
     jsregexp.cc
     jump-target.cc
     lithium-allocator.cc
     lithium.cc
     liveedit.cc
     log-utils.cc
     log.cc
     mark-compact.cc
     messages.cc
     objects.cc
+    objects-printer.cc
     objects-visiting.cc
     oprofile-agent.cc
     parser.cc
     preparser.cc
     preparse-data.cc
     profile-generator.cc
     property.cc
     regexp-macro-assembler-irregexp.cc
     regexp-macro-assembler.cc
     regexp-stack.cc
@@ skipping 121 matching lines @@
   'os:freebsd': ['platform-freebsd.cc', 'platform-posix.cc'],
   'os:openbsd': ['platform-openbsd.cc', 'platform-posix.cc'],
   'os:linux':   ['platform-linux.cc', 'platform-posix.cc'],
   'os:android': ['platform-linux.cc', 'platform-posix.cc'],
   'os:macos':   ['platform-macos.cc', 'platform-posix.cc'],
   'os:solaris': ['platform-solaris.cc', 'platform-posix.cc'],
   'os:nullos':  ['platform-nullos.cc'],
   'os:win32':   ['platform-win32.cc'],
   'mode:release': [],
   'mode:debug': [
-    'objects-debug.cc', 'objects-printer.cc', 'prettyprinter.cc',
+    'objects-debug.cc', 'prettyprinter.cc',
     'regexp-macro-assembler-tracer.cc'
-  ],
-  'objectprint:on': ['objects-printer.cc']
+  ]
 }
 
 
 D8_FILES = {
   'all': [
     'd8.cc', 'd8-debug.cc'
   ],
   'os:linux': [
     'd8-posix.cc'
   ],
@@ skipping 90 matching lines @@
       snapshot_cc = 'snapshot.cc'
     snapshot_obj = context.ConfigureObject(env, snapshot_cc, CPPPATH=['.'])
   else:
     snapshot_obj = empty_snapshot_obj
   library_objs = [non_snapshot_files, libraries_obj, snapshot_obj]
   return (library_objs, d8_objs, [mksnapshot])
 
 
 (library_objs, d8_objs, mksnapshot) = ConfigureObjectFiles()
 Return('library_objs d8_objs mksnapshot')