Upgrade to latest bazlets version to compile against 2.15

Change-Id: I765b3f880740ece815dfb9e849ffc7721a166b9d
diff --git a/WORKSPACE b/WORKSPACE
index 5a8b64a..886a520 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "d9abef15db0f934bfe9adcb40b0c475807fd12bf",
+    commit = "92943361811e20b96f4c979992a0b384711c6456",
     #    local_path = "/home/<user>/projects/bazlets",
 )