[Mesa-stable] Couple of fixes from Andres (all stable branches)

[Emil Velikov]

Forgot to add the tag while pushing the below

commit e0674e740bf84085dec898ffd87bdeb2027e620f
Author: Andres Rodriguez <andresx7 at gmail.com>
Date:   Wed Jan 18 18:07:56 2017 -0500

   vulkan/wsi: clarify the severity of lack of DRI3 v2

commit a3ad6a34c6ba222ec93a2cfd0cac205c62574eb7
Author: Andres Rodriguez <andresx7 at gmail.com>
Date:   Wed Jan 18 17:48:36 2017 -0500

   radv: fix include order for installed headers v2


-Emil