Move libselinux to chromiumos-overlay

BUG=b:242961867
TEST=emerge-kevin libselinux

Cq-Depend: chromium:3853767
Change-Id: I8ec844d4908858263226cf750454355d63a967d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3852376
Commit-Queue: Chung-Sheng Wu <chungsheng@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Chung-Sheng Wu <chungsheng@google.com>
4 files changed