Fix shell_apptest for android.

mojo/tools/embed/data.h

+// 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.
+
+#ifndef MOJO_TOOLS_EMBED_DATA_H_
+#define MOJO_TOOLS_EMBED_DATA_H_
+
+#include <stddef.h>  // For size_t.
+
+namespace mojo {
+namespace embed {
+
+struct Data {
+  const char* const hash;
+  const char* const data;
+  const size_t size;
+};
+
+}  // namespace embed
+}  // namespace mojo
+
+#endif  // MOJO_TOOLS_EMBED_DATA_H_