Upgrade bazlets to latest stable-2.15 to build with 2.15.15 API
Upgrade bazlets to latest stable-2.15 to build with 2.15.15 API

Change-Id: Ia0a7c7754fa077eae2fbc0f1c1fa4cb6df3b6350

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