Upgrade bazlets to latest stable-2.14

download_file.py: Fix root workspace directory detection

Change-Id: Id2da57a98ab0344dc9942d9ff0338309494b0f48

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 1ea41fe..c23f9e7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "ece89b00ac1049233d9f5bb471a8d37b57667d9e",
+    commit = "e48c6a61d5a3f9ab4589f324fc85b8e3777d8854",
     #local_path = "/home/<user>/projects/bazlets",
 )