[PATCH wayland] tests: Add missing file to distribution

[Daniel Stone]

On 19 January 2018 at 17:37, Derek Foreman <derekf at osg.samsung.com> wrote:
> In f74c9b98db49ce16e037c3012590c4a24a4fc32e I added tests.xml to the
> repository, but not to the distribution.

Oops. :(

Reviewed-by: Daniel Stone <daniels at collabora.com>

Cheers,
Daniel