Implement a trivial Mojo EchoService that can be connected to over DBus

mojo/mojo_examples.gypi

Index: mojo/mojo_examples.gypi
diff --git a/mojo/mojo_examples.gypi b/mojo/mojo_examples.gypi
index 590285fd192ef0dd3cbfcf2e218f5e4c699e9e91..aa0d804162947f205a9fbded4628a1c9154f169d 100644
--- a/mojo/mojo_examples.gypi
+++ b/mojo/mojo_examples.gypi
@@ -80,6 +80,29 @@
       'includes': [ 'build/package_app.gypi' ],
     },
     {
+      'target_name': 'mojo_dbus_echo',
+      'type': 'shared_library',
+      'dependencies': [
+        '../base/base.gyp:base',
+        'mojo_bindings',
+        'mojo_environment_standalone',
+        'mojo_echo_bindings',
+        'mojo_shell_client',
+        'mojo_system',
+        'mojo_utility',
+      ],
+      'sources': [
+        'examples/dbus_echo/dbus_echo_app.cc',
+      ],
+    },
+    {
+      'target_name': 'package_mojo_dbus_echo',
+      'variables': {
+        'app_name': 'mojo_dbus_echo',
+      },
+      'includes': [ 'build/package_app.gypi' ],
+    },
+    {
       'target_name': 'mojo_pepper_container_app',
       'type': 'shared_library',
       'dependencies': [