xorg-3.eclass: Update to the latest upstream version.

New libX11 requires xorg-3.eclass.

BUG=chromium:1115945
TEST=None

Change-Id: Ifd0d520bee3f30d146bf2e4e3204c92945c9f95e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2364993
Reviewed-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Fergus Dall <sidereal@google.com>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Commit-Queue: David Riley <davidriley@chromium.org>
Auto-Submit: David Riley <davidriley@chromium.org>
1 file changed