When running cats, dont download deployment manifest

Signed-off-by: Sheel Choksi <sheelc@pivotallabs.com>
Bump src/warden-linux

Bump cloudfoundry-incubator/warden-linux:
  Alex Suraci:
     fix race in process tracker
     fix leaking of stdin file descriptors
     remove unused dep
     refactor process initialization flow
     do not allow setting window size until linked
     de-flake tty resizing test
     slight cleanup in iodaemon tty test
     set terminal raw when spawned with tty