Update bazlets to latest revision on stable-2.14

Includes the following changes, among many others:

- Switch to 2.14.9-SNAPSHOT Gerrit API version for local dev
- Use bazel-cache instead of buck-cache

Change-Id: Ib43687983c9f6ef44f03e46efe8922e60e9813d7
diff --git a/WORKSPACE b/WORKSPACE
index 50ebfc9..5cbc8e7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "696f59e1b591c23469433cd7a8e5933c738682c5",
+    commit = "11ce7521051ca73598d099aa8a396c9ffe932a74",
     # local_path = "/home/<user>/projects/bazlets",
 )