Merge branch 'stable-2.16'

* stable-2.16:
  Upgrade bazlets to latest stable-2.15 to build with 2.15.10 API

Change-Id: I1837fa98f3f8942ecd19d2d3b9a74505cdc32861
tree: e32445cfe4f29b3de0a7d008ec965ef9a1212ed9
  1. src/
  2. .gitignore
  3. BUILD