Add spirv-binaries validation step
Add spirv-binaries validation step

Run external/vulkancts/scripts/build_spirv_binaries.py
as a build validation step to ensure that SPIR-V binaries
are not broken.

Components: Framework

VK-GL-CTS issue: 628

Change-Id: I74a88a16b26aa7be5f0b3c44dbeb71bae738049c

KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,googlestadia/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,googlestadia/VK-GL-CTS