x11-libs/libX11: Upgrade to 1.6.12 from upstream

BUG=chromium:1129840
TEST=emerge-tatl x11-libs/libX11

Change-Id: I6458e5b428d9c8e31a30e564935b4a29d6c2945c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2421711
Tested-by: Fergus Dall <sidereal@google.com>
Reviewed-by: David Riley <davidriley@chromium.org>
2 files changed