incremental: upgraded package to upstream

Upgraded dev-python/incremental to version 17.5.0 on amd64, arm

It's needed by twisted.

BUG=chromium:999876
TEST=update_chroot

Change-Id: I15228a6d5444133040f505bd2babc9614a233c86
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2212081
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Yilin Yang (kerker) <kerker@chromium.org>
Commit-Queue: Yilin Yang (kerker) <kerker@chromium.org>
4 files changed