bump baggageclaim
bump baggageclaim

concourse/concourse#1368
concourse/baggageclaim#9

Submodule src/github.com/concourse/baggageclaim 344fe25f..a9bad484:
  > Merge branch 'async-volume-creation' of https://github.com/SHyx0rmZ/baggageclaim into SHyx0rmZ-async-volume-creation

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse