Fix lineprocessor sample and include it in the gyp build.

samples/samples.gyp

Index: samples/samples.gyp
diff --git a/samples/samples.gyp b/samples/samples.gyp
index 55b2a98acd38ed699d52e07443dca5574eed2f50..3c720a748a19a146fcbae8d05bccdd27bb752b28 100644
--- a/samples/samples.gyp
+++ b/samples/samples.gyp
@@ -1,4 +1,4 @@
-# Copyright 2011 the V8 project authors. All rights reserved.
+# 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:
@@ -48,6 +48,12 @@
       'sources': [
         'process.cc',
       ],
+    },
+    {
+      'target_name': 'lineprocessor',
+      'sources': [
+        'lineprocessor.cc',
+      ],
     }
   ],
 }