[FUG-BR] Xorg mega update

[Otacílio]

Foi feito hoje um mega update no xorg. Esta na revisão 319055 do ports.
Me interessou principalmente pela adição do Mesa 8.0.4. Abaixo as novidades:

The FreeBSD x11 team proudly presents
an zeising, kwm, miwi, bapt, eadler production:

Xorg 7.7

Starring:
xserver 1.12.4 (new xorg only)
Mesa 8.0.4, including libGL, libGLU and dri (new xorg only)
libX11 1.5.0
libxcb 1.9
libdrm 2.4.42 (new xorg only)
freeglut 2.8.1
Also starring:
Updates to drivers and other libraries and utilities

Additional notes:
Change pkgconf to be a build dependency.
Add a new USE_XORG, xcb, to depend on libxcb and update all ports to use
this.
Trim makefile headers.
Take maintanership of x11/xcb-proto, ok'd by ashish.
If you are running WITH_NEW_XORG=, you need to rebuild all installed
drivers, see UPDATING for more information.
Various fixes to make ports compile.

PR:		ports/177942
Exp-run by:	miwi
Approved by:	portmgr (miwi)

Thanks to all who helped testing!