Add Mojo{Set,Get}DataPipeProducerOptions() to the NaCl system thunks.

mojo/public/platform/nacl/mojo_irt.h

Index: mojo/public/platform/nacl/mojo_irt.h
diff --git a/mojo/public/platform/nacl/mojo_irt.h b/mojo/public/platform/nacl/mojo_irt.h
index 92ad7440f99ba9f98293581daa9515037cb942df..6259eca50f030a48d8b377d710da4de0147c89a2 100644
--- a/mojo/public/platform/nacl/mojo_irt.h
+++ b/mojo/public/platform/nacl/mojo_irt.h
@@ -51,6 +51,13 @@ struct nacl_irt_mojo {
       const struct MojoCreateDataPipeOptions* options,
       MojoHandle* data_pipe_producer_handle,
       MojoHandle* data_pipe_consumer_handle);
+  MojoResult (*MojoSetDataPipeProducerOptions)(
+      MojoHandle data_pipe_producer_handle,
+      const struct MojoDataPipeProducerOptions* options);
+  MojoResult (*MojoGetDataPipeProducerOptions)(
+      MojoHandle data_pipe_producer_handle,
+      struct MojoDataPipeProducerOptions* options,
+      uint32_t options_num_bytes);
   MojoResult (*MojoWriteData)(MojoHandle data_pipe_producer_handle,
                               const void* elements,
                               uint32_t* num_bytes,