This is unnecessary because Xwayland logic doesn't bring in new
dependencies. We can just compile in our Xwayland-related code
when wlroots has been built with Xwayland support.
See this Sway patch: https://github.com/swaywm/sway/pull/8165
wlroots as a subproject now yields the xwayland meson option to its
parent. We need to match the type for this to work. This also adds
support for auto mode, where xwayland is used if present but no warning
is given otherwise.
With Cage becoming more popular since its mention on Phoronix and
therefore getting more use-cases than just my own project, add XWayland
support. The refactoring of 2cf40f7 makes this much easier. Note that
this is a no-cost addition for those of us not using XWayland as it is a
compile-time option that needs to be explicitly enabled by adding
`-Dxwayland=true` to your meson command.
