Add Mojo{Set,Get}DataPipeConsumerOptions() 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 4d234039ab7a69f9aef97440cec4ff3a2887c978..92ad7440f99ba9f98293581daa9515037cb942df 100644
--- a/mojo/public/platform/nacl/mojo_irt.h
+++ b/mojo/public/platform/nacl/mojo_irt.h
@@ -61,6 +61,13 @@ struct nacl_irt_mojo {
                                    MojoWriteDataFlags flags);
   MojoResult (*MojoEndWriteData)(MojoHandle data_pipe_producer_handle,
                                  uint32_t num_bytes_written);
+  MojoResult (*MojoSetDataPipeConsumerOptions)(
+      MojoHandle data_pipe_consumer_handle,
+      const struct MojoDataPipeConsumerOptions* options);
+  MojoResult (*MojoGetDataPipeConsumerOptions)(
+      MojoHandle data_pipe_consumer_handle,
+      struct MojoDataPipeConsumerOptions* options,
+      uint32_t options_num_bytes);
   MojoResult (*MojoReadData)(MojoHandle data_pipe_consumer_handle,
                              void* elements,
                              uint32_t* num_bytes,