[Mesa-stable] Nominate 31908d6a4a3309f4cd4b953d6eecdf41595b1299 for 17.0

[Nayan Deshmukh]

Hi Emil,

Please cherry pick the following commit.

commit 31908d6a4a3309f4cd4b953d6eecdf41595b1299
Author: Nayan Deshmukh <nayan26deshmukh at gmail.com>
Date:   Thu Jan 19 14:59:28 2017 +0530

    st/vdpau: only send buffers with B8G8R8A8 format to X

    PresentPixmap only works if the pixmap depth matches with the
    window depth, otherwise it returns a BadMatch protocol error.
    Even if the depths match, the result won't look correctly
    if the VDPAU RGB component order doesn't match the X11 one so
    we only allow the X11 format.
    For other buffers we copy them to a buffer which is send to X.

    v2: only send buffers with format VDP_RGBA_FORMAT_B8G8R8A8
    v3: reword commit message
    v4: add comment explaining the code

    Signed-off-by: Nayan Deshmukh <nayan26deshmukh at gmail.com>
    Reviewed-by: Christian König <christian.koenig at amd.com>

It fixes a regression which causes vlc to show corrupted colors when
using VDPAU.

Regards,
Nayan