Make
  git cl issue --json=-
print Gerrit host and project as well.

Change-Id: If53d681252eaa738f044a724ee45e70df4b1eef1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2766153
Commit-Queue: Nodir Turakulov <nodir@chromium.org>
Reviewed-by: Dean Berris <dberris@chromium.org>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>