Log Message:
Update to 7.4.4. Make software ratserizer actually work. Add one patch from
upstream repo to fix null pointer dereference.

Changes in 7.4.4:

* Fixed i965/i915 segfault in screen destruction (bug 22408)

Changes in 7.4.3:

* Fixed texture object reference counting bug (bug 21756)
* Allow depth/stencil textures to be attached to GL_STENCIL_ATTACHMENT
  point (SF bug 2793846)
* Added missing glGet case for GL_VERTEX_ARRAY_BINDING_APPLE
* Fixed some OSMesa build issues
* Fixed a vertex buffer object crash
* Fixed broken glTexImage3D() when image type = GL_BITMAP
* Fixed some GLSL preprocessor bugs
* Fixed framebuffer mem leak in i945/i965 DRI drivers
* Fixed texture coordinate repeat bug in swrast (bug 21872)
* Fixed incorrect viewport clamping (lower bound is zero, not one)
* GLX fix for glean's makeCurrent test case