merge Mesa 7.8.2.
import Mesa 7.8.2, glut part. major changes since 7.7.1: - several new extensions for various drivers - many i965, i915 driver fixes - many glsl fixes
merge MesaGLUT 7.7.1
initial import of MesaGLUT-7.7.1
initial import of MesaGLUT-7.4.2
Initial import of MesaGLUT, version 7.0.3 for native X.Org's benefit.