Add the check that verify that all sources are in //:srcs filegroup to ci.bazel.io
Add the check that verify that all sources are in //:srcs filegroup to ci.bazel.io

Change-Id: I8c956300ab7cee9c77ea91b5d8989614b56de491

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration