Upgrade bazlets to latest stable-2.16 to build with 2.16.16 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.16 API

Change-Id: Ie7cdec72932cf1e1428a7775f9ac4e7e81f60e8a

GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project,GerritCodeReview/plugins_delete-project