mit-krb5: update python deps

This pulls a minor change from upstream to switch to Python 3.
Build seems to work fine with it.

BUG=chromium:1007152
TEST=CQ passes

Change-Id: Ic00ffc6ec4973c38aabcac7d6ac0795ccb2f68dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2605731
Reviewed-by: Tomasz Dobrowolski <tomdobro@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
3 files changed