First attempt of building Mesa 10.2.1, needs upgrading some stock packages:
* libdrm: Upgraded to 2.4.54.
* xcb-proto: Upgraded to 1.10.
* libxcb: Upgraded to 1.10.

Add some new dependency packages:
* dri3proto: Added version 1.0.
* presentproto: Added version 1.0.
* libxshmfence: Added version 1.1.

Other modified/upgraded packages are:
* glamor-egl: Upgraded to 0.5.1.
* libreoffice: Upgraded to 4.1.6.2.
* xf86-video-ati: Upgraded to 7.3.0.