sane-backends: upgraded package to upstream

Upgraded media-gfx/sane-backends to version 1.0.24-r3 on amd64, arm, x86

BUG=chromium:356263
TEST=emerge-${BOARD} sane-backends

Change-Id: I460f6551b0145f29a3aaaffe8b539c0fcf27fb23
Reviewed-on: https://chromium-review.googlesource.com/191705
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Paul Stewart <pstew@chromium.org>
13 files changed