Update bazlets to latest revision on stable-2.14

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

Change-Id: I1dec88d8bfca8e729d7711571d896d9cf47742b4
diff --git a/WORKSPACE b/WORKSPACE
index 9142426..f336abb 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "a920e0c1801a67a2e0803dc149923ff3b81ccc6a",
+    commit = "8d7664e169100e537340aed89345c3245cf12f22",
     #local_path = "/home/<user>/projects/bazlets",
 )