bump bbs
bump bbs

[finishes #104365380]

Submodule src/github.com/cloudfoundry-incubator/bbs 37d3bc1..c547abd:
  > Event stream requests don't emit latency metrics

Signed-off-by: Kris Hicks <6d3f751023bc04266d4da2ff94804f4240839fe2@pivotal.io>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release