Add optfeature.eclass.

Upgraded eclass/optfeature.eclass

BUG=chromium:1147148
TEST=sudo emerge sccache

Change-Id: Ica00a7a69f99f2d2d9a0270d6807b836a22db62d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2562438
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed