[Chromoting] (Re-)Enable AppRemoting sample apps by default in all.gyp.

remoting/remoting_all.gyp

Index: remoting/remoting_all.gyp
diff --git a/remoting/remoting_all.gyp b/remoting/remoting_all.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..7d0af526777af9725b1109b755890e4d81d5845b
--- /dev/null
+++ b/remoting/remoting_all.gyp
@@ -0,0 +1,16 @@
+# 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'remoting_all',
+      'type': 'none',
+      'dependencies': [
+        '../remoting/remoting.gyp:*',
+        '../remoting/app_remoting_webapp.gyp:*',
+      ],
+    },  # end of target 'remoting_all'
+  ],  # end of targets
+}