Merge branch 'stable-3.0'

* stable-3.0:
  Upgrade bazlets to latest stable-3.0 to build with 3.0.7 API
  Upgrade bazlets to latest stable-2.16 to build with 2.16.16 API

Change-Id: I5b28d2479d5401b7e45b5d9f24ca46887a6e144f