Add an even simpler standalone example.

This example is like the echo examples, but has no dependencies outside
of //mojo/public (in particular, no //base dependency).

R=vardhan@google.com

Review URL: https://codereview.chromium.org/1702103002 .
diff --git a/examples/hello_mojo/BUILD.gn b/examples/hello_mojo/BUILD.gn
new file mode 100644
index 0000000..1c909a2
--- /dev/null
+++ b/examples/hello_mojo/BUILD.gn
@@ -0,0 +1,49 @@
+# Copyright 2016 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.
+
+import("//mojo/public/mojo_application.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
+
+group("hello_mojo") {
+  deps = [
+    ":hello_mojo_client",
+    ":hello_mojo_server",
+  ]
+}
+
+mojo_native_application("hello_mojo_client") {
+  deps = [
+    ":hello_mojo_interface",
+    "//mojo/public/c/system",
+    "//mojo/public/cpp/application:standalone",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/system",
+    "//mojo/public/cpp/utility",
+  ]
+
+  sources = [
+    "hello_mojo_client.cc",
+  ]
+}
+
+mojo_native_application("hello_mojo_server") {
+  deps = [
+    ":hello_mojo_interface",
+    "//mojo/public/c/system",
+    "//mojo/public/cpp/application:standalone",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/system",
+    "//mojo/public/cpp/utility",
+  ]
+
+  sources = [
+    "hello_mojo_server.cc",
+  ]
+}
+
+mojom("hello_mojo_interface") {
+  sources = [
+    "hello_mojo.mojom",
+  ]
+}