Upgrade to a new Bazel version

This one has better performance and various new features. It also
prevents us from falling too far behind upstream.

Change-Id: I3b8e1c5bda886ea2e990523af9e6de2434c784be
diff --git a/y2016/dashboard/BUILD b/y2016/dashboard/BUILD
index 65e650c..fd2fdbb 100644
--- a/y2016/dashboard/BUILD
+++ b/y2016/dashboard/BUILD
@@ -3,7 +3,7 @@
 
 gen_embedded(
   name = 'gen_embedded',
-  srcs = glob(['www_defaults/**/*'], ['www/**/*']),
+  srcs = glob(['www_defaults/**/*'], exclude=['www/**/*']),
 )
 
 aos_downloader_dir(