Update bazlets to latest revision on stable-2.15

Change-Id: Ia7bd55515b907857561c56572b4e1ca1753cb8d7
diff --git a/WORKSPACE b/WORKSPACE
index 7ea896f..9ec1b44 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "e15ad03897f040435d6c5e808b697b1125b964c1",
+    commit = "cbddbc2b9571b1d692fb823ba8791ccd60b52421",
     # local_path = "/home/<user>/projects/bazlets",
 )