libX11: upgraded package to upstream

Upgraded x11-libs/libX11 to version 1.8.7.

BUG=b:305202696,b:305377750,b:305383858
TEST=CQ

Change-Id: I6fe602be827e9d60c87c43e94c1b086eaed458cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/4938434
Commit-Queue: James Ye <jamesye@google.com>
Tested-by: James Ye <jamesye@google.com>
Commit-Queue: Emil Mikulic <easy@google.com>
Reviewed-by: Fergus Dall <sidereal@google.com>
Reviewed-by: Emil Mikulic <easy@google.com>
(cherry picked from commit 52ddf72e84c5b4a6455ce92a1704eea0a537ca1f)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/4957893
2 files changed