Update mojo sdk to rev 7214b7ec7d27563b2666afad86cf1c5895c56c18

third_party/mojo/src/mojo/public/go/system/system_nacl.go

Index: third_party/mojo/src/mojo/public/go/system/system_nacl.go
diff --git a/third_party/mojo/src/mojo/public/go/system/system_nacl.go b/third_party/mojo/src/mojo/public/go/system/system_nacl.go
new file mode 100644
index 0000000000000000000000000000000000000000..8bf001c1e66a4267b1b760be4e91b6b8176e1dd9
--- /dev/null
+++ b/third_party/mojo/src/mojo/public/go/system/system_nacl.go
@@ -0,0 +1,12 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package system
+
+import "runtime/nacl"
+
+// NaCl uses the runtime's Mojo IRT based system implementation.
+func init() {
+	sysImpl = &nacl.MojoNaClSystem{}
+}