Added preparser strict-mode tests.

preparser/preparser-process.cc

Index: preparser/preparser-process.cc
diff --git a/preparser/preparser-process.cc b/preparser/preparser-process.cc
index 2dc98c057db19a089458f299ae305654e7e562d2..9c8d7b44821fdf1dd61883e43dba7e841b6ed293 100644
--- a/preparser/preparser-process.cc
+++ b/preparser/preparser-process.cc
@@ -252,7 +252,8 @@ void CheckException(v8::PreParserData* data,
     }
   } else if (reader.throws()) {
     const char* message = reader.message();
-    fail(data, "Throws unexpectedly with message: %s\n", message);
+    fail(data, "Throws unexpectedly with message: %s at location %d-%d\n",
+         message, reader.beg_pos(), reader.end_pos());
   }
 }