dev-libs/wayland: Uprev to 1.19.0

This is the latest upstream version and has been out for a few months now.

The wayland-scanner binary has been split into it's own package, but
should be kept at the same version.

BUG=none
TEST=CQ

Change-Id: Idcc0301ebbacf71f9014abb7f4734046d71f9022
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2981320
Commit-Queue: Fergus Dall <sidereal@google.com>
Commit-Queue: David Munro <davidmunro@google.com>
Tested-by: Fergus Dall <sidereal@google.com>
Auto-Submit: Fergus Dall <sidereal@google.com>
Reviewed-by: David Munro <davidmunro@google.com>
6 files changed