mesa: Bump version to 10.0.0.

mesa: Bump version to 10.0.0.

Mesa now supports OpenGL 3.2 and GLSL 1.50, so bump the Mesa major
version from 9 to 10 to reflect this.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>