mesa-freedreno: Add README.md

Change-Id: Ie991b4eba561fbf5429117d5b4651d7950a742ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/1692024
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Reviewed-by: Eric Anholt <anholt@google.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Commit-Queue: Kristian H. Kristensen <hoegsberg@chromium.org>
1 file changed