[arch-general] Xorg 7.5 hits testing

I've built the new Xorg 7.5 based on xorg-server 1.7.1rc1 and Mesa 7.6. Some very old drivers have been dropped because they are no more developed and won't build anymore. I hope I have updated all essential parts. Some Xorg fonts related packages still need a bump. Mesa 7.6 is built right now plain upstream. This means Gallium 3d stack for Nouveau and Intel. For Intel we might go back to old way DRI when we can't solve some existing issues. Radeon is built the old DRI way. Let's pray the update goes smooth. So far only Jan has played with Intel drivers. We will probably need some time until all important regressions and bugs have been solved. Good luck. -Andy