Add a system() call to the d8 shell (Unix only).

src/d8.cc

Index: src/d8.cc
===================================================================
--- src/d8.cc	(revision 1618)
+++ src/d8.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2009 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:
@@ -342,6 +342,7 @@
   global_template->Set(String::New("load"), FunctionTemplate::New(Load));
   global_template->Set(String::New("quit"), FunctionTemplate::New(Quit));
   global_template->Set(String::New("version"), FunctionTemplate::New(Version));
+  global_template->Set(String::New("system"), FunctionTemplate::New(System));
 
   utility_context_ = Context::New(NULL, global_template);
   utility_context_->SetSecurityToken(Undefined());