Bazel: Update bazlets to the latest master revision

The latest revision includes various fixes to allow the build
to work with recent versions of Bazel.

Change-Id: I72c100b99762010946d9b2784286af560bbdf185
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

WORKSPACE

@@ -2,7 +2,7 @@ workspace(name = "jgit")
 
 load("//tools:bazlets.bzl", "load_bazlets")
 
-load_bazlets(commit = "3afbeab55ece585dbfc7a980bf7214b24ddbbe86")
+load_bazlets(commit = "09a035e98077dce549d5f6a7472d06c4b8f792d2")
 
 load(
     "@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl",