Upgrade bazlets to the latest stable-2.15 revision

* Update API to 2.15.3
  Fix call to the fail skylark global in junit.bzl
  Format .bzl files with buildifier version 0.12.0
  Update API to 2.14.10
  Set snapshot version to 2.14.11-SNAPSHOT
  Upgrade API version to 2.14.9
  Adjust names of prolog dependencies
  Add optional dir_name argument to gerrit_plugin
  gerrit_plugin: Improve stamping error message
  Upgrade Gerrit API to version 2.15.2
  Set Gerrit API snapshot version to 2.15.2-SNAPSHOT
  Fix the error in project properties generation file
  Switch to 2.14.9-SNAPSHOT Gerrit API version for local dev

Change-Id: Iea7718c128633d75ab73263d03e46b391db7f619
diff --git a/WORKSPACE b/WORKSPACE
index 50c38b8..b57d59c 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "183a38c907f0552c6010a3aa180df4d53347726c",
+    commit = "3995849fe742201d93e40f2b109dcff13dd0a4ed",
     #    local_path = "/home/<user>/projects/bazlets",
 )