intel lin changelog

As usual we have a large number of bug fixes since the last release:

 * Prevent a stray relocation being left after a buffer is removed from
   a batch, leading to GPU hangs.

 * Make the driver more robust against its own failures to submit batches
   by falling back to software rendering.

 * Fix emission of scanline waits for secondary pipes on gen6/7. Otherwise
   you may encounter GPU hangs in MI_WAIT_FOR_EVENT.

 * Fix a missing corner pixel when drawing rectangles with PolyLines
   https://bugs.freedesktop.org/show_bug.cgi?id=55484

 * Don't try to use Y-tiling colour buffers with mesa/i915c as mesa
   doesn't support them and wil fallback to software rendering

 * Ensure that any cached mmaps are invalidated for a SwapBuffers
   https://bugs.freedesktop.org/show_bug.cgi?id=60042

 * Correctly handle the composition of rotated displays too large for the
   3D pipeline
   https://bugs.freedesktop.org/show_bug.cgi?id=60124

 * Fix the computation of the planar video frame size
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1104180