Update bazlets to latest revision on master

Remove reference to deprecated FileType to fix the build with
the latest bazel version.

Change-Id: I1dec88d8bfca8e729d7711571d896d9cf47742b4
diff --git a/WORKSPACE b/WORKSPACE
index e90cd64..1b60fd4 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "738ddb525810a50c792736d7115a1bb5289bd3d3",
+    commit = "279d12d33bd17dd49951146186f3d17f50fdc919",
     #local_path = "/home/<user>/projects/bazlets",
 )