Upgrade bazlets to latest master to build with 3.1.2 API
Upgrade bazlets to latest master to build with 3.1.2 API

Change-Id: I62d8d4936f97bae2334c20f077cac299f16c5f0c

GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody,GerritCodeReview/plugins_javamelody