autoconf-wrapper: upgraded package to upstream

Upgraded sys-devel/autoconf-wrapper to version 15 on amd64, arm

BUG=chromium:1253914
TEST=CQ passes

Change-Id: I7c5ecdc62d8f31f552c0df13d87c593e9db3ab6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3190630
Auto-Submit: Sami Kyöstilä <skyostil@chromium.org>
Tested-by: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
6 files changed