[wayland] building: Clarify after the split into wayland and wayland-demos repos

[Sedat Dilek]

Hi,

unfortunately, the wayland-website (building) does not have updated
informations on how to build after the split of
1. wayland core [1]
2. wayland libs and demos [2]

Can someone please enlighten on this?
I would update the building website accordingly.
Currently, I can only help with providing patches.

Regards,
- Sedat -

[1] http://cgit.freedesktop.org/wayland/wayland/commit/?id=fcfb4e30a47a4cd2416dac210521594b489c8bfd
[2] http://cgit.freedesktop.org/wayland/wayland-demos/commit/?id=b2d71852fd2ace71722f73065dbccb09c8e9910e