Upgrade bazlets to latest stable-2.16 to build with 2.16.1 API

Change-Id: I692b13b3974581065d35a0e13e8e50420a3f3ec2
diff --git a/WORKSPACE b/WORKSPACE
index 4be5a93..70d27a4 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "c2227415d5044f8439bd47edffb0f052f8da2ac5",
+    commit = "d025e909c2e8a369712165309f599a2765005f2d",
     # local_path = "/home/<user>/projects/bazlets",
 )