Add gdb, curl and vim to debug image to chase envoy crashes (#595)
Add gdb, curl and vim to debug image to chase envoy crashes (#595)

* Add gdb, curl and vim to debug image to chase envoy crashes

* Add emacs and nano

* Remove one extra curl

vadimeisenbergibm/pilot,kyessenov/pilot,kyessenov/pilot,kyessenov/pilot,vadimeisenbergibm/pilot,vadimeisenbergibm/pilot,kyessenov/pilot,istio/old_pilot_repo,istio/old_pilot_repo,istio/old_pilot_repo