Add ssh key for jcgregorio cloudtop instance.
Add ssh key for jcgregorio cloudtop instance.

Change-Id: Ia88f77ee597a3f1ce43c8ef86450d8521efde5bd
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/428981
Auto-Submit: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot