Patches to libva and libva-intel driver to solve issues with some h.264 videos

This patches are to fix crashes and artifacts, when a movie with certain resolution is played on IvyBridge.
1920x1080 play good without this patch, but there are lot of movies encoded without black borders that causes this issue.

Please be aware that I'm using llibva and and libva-driver-intel directly from freedesktop.org's git (master) so my meta file are modified to download gzip archive
from freedesktop.org but I'm affraid that this breaks OpenELEC's package  versioning.