Merge branch 'stable-3.0'

* stable-3.0:
  Upgrade bazlets to latest stable-2.16 to build with 2.16.17 API
  Upgrade bazlets to latest stable-3.0 to build with 3.0.8 API

Change-Id: I9f20b5a80883d5283ed0f83129f2c485d08f0a01