Add tests to check that the zwp_buffer_release_v1 events are emitted per
surface commit.
To be able to test this we need to use a renderer that holds the buffer
until the next buffer is committed, hence we use the pixman renderer.
Changes in v7:
- Remove references to obsolete noop-hold renderer.
Changes in v5:
- Meson support.
Changes in v4:
- Use the pixman renderer instead of the (now gone) noop-hold
renderer.
Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>