Mesa (vulkan): Merge remote-tracking branch 'public/master' into vulkan

[Jason Ekstrand]

Module: Mesa
Branch: vulkan
Commit: 76fa7b16f474253356d3bf59adc91769dc51f184
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=76fa7b16f474253356d3bf59adc91769dc51f184

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Thu Apr 14 18:30:52 2016 -0700

Merge remote-tracking branch 'public/master' into vulkan

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