unrar: upgraded package to upstream

Upgraded app-arch/unrar to version 6.0.7 on amd64, arm

BUG=chromium:1253807
TEST=CQ + smoke test on volteer

Change-Id: I33d335f619eb2a00c872938b1cc977511b67cf59
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3188515
Auto-Submit: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Tested-by: Sami Kyöstilä <skyostil@chromium.org>
4 files changed