weston: upgrade 8.0.0 -> 9.0.0

weston: upgrade 8.0.0 -> 9.0.0

Weston 9.0.0 is released! This release cycle has been pretty quiet,
with just a few new features:

- A new kiosk shell allows to display regular desktop apps in an
  always-fullscreen mode
- Improved testing infrastructure: the test harness has been
  redesigned, DRM tests are now supported, DRM and OpenGL tests are now
  enabled in our CI
- DRM panel orientation property support

As always, a number of bug fixes are included as well.
https://lists.freedesktop.org/archives/wayland-devel/2020-September/041595.html

Add a patch to fix building of tests/weston-test-fixture-compositor.c on musl.

Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>