Revert "glx/dri3: Request non-vsynced Present for swapinterval zero. (v3)"

This reverts commit d332e5046e3b8cd92a819f2d9c9ca976f0f4eb0c.

May not be the correct fix. Discussion is ongoing.

http://lists.freedesktop.org/archives/mesa-dev/2014-December/072969.html
Update version to 10.3.6

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Add release notes for the 10.3.6 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
docs: Add sha256 sums for the 10.3.6 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>