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>
Add release notes for the 10.4.1 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
docs: Add sha256 sums for the 10.4.1 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
docs: add news item and link release notes for mesa 10.3.6/10.4.1

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
vc4: Drop the content of vc4_flush_resource().

The callers all follow it with a flush of the context, and the flush of
the context gives us more information about how things are being flushed.
vc4: Move draw call reset handling to a helper function.

This will be more important in the next commit, when there's more state to
reset to nonzero values, and I want an early exit from the submit
function.
vc4: Only render tiles where the scissor ever intersected them.

This gives a 2.7x improvement in x11perf -rect100, since we only end up
load/storing the x11perf window, not the whole screen.
nv50,nvc0: implement half_pixel_center

LAST_LINE_PIXEL has actually been renamed to PIXEL_CENTER_INTEGER in
rnndb; use that method to implement the rasterizer setting, used for
st/nine.

Signed-off-by: Tiziano Bacocco <tizbac2@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.4" <mesa-stable@lists.freedesktop.org>