Bump wayland version numbers

Both are now at 1.0.5
Bump mesa

Add a patch to disable nouveau from configure
Update to use fixed versions

This change pins the built versions to a more manageable set.
- mesa: 9.0.3
- wayland, weston: 1.0.6

We can also drop the need for locally built libdrm2, since debian sid
now comes with 2.4.40~something.
Update packaging for new weston

Weston now provides a barebones "SDK" too, which is a practically just a
few headers and one .pc file. Include these (with matching manpage) in
entirely new package "weston-dev".

The stack is now buildable again.
Include the install file for weston-dev

-doh- Forgot to add this one.