wayland-egl: rename wayland-egl-{priv,backend}.h

In preparation to lifting the whole thing out as a separate library.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Miguel A. Vico <mvicomoya@nvidia.com>
5 files changed