zlib: upgraded package to upstream

Upgraded sys-libs/zlib to version 1.2.11-r4 on amd64

BUG=b:200958881
TEST=emerge zlib

Change-Id: Ica004f4e8f024e5b1e590cb287c674d43d5f74ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3183528
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
8 files changed