Fix missing background in instancing sample (#265)
Fix missing background in instancing sample (#265)

* Disable depth test for background

* Updated copyright
KhronosGroup/Vulkan-Samples,KhronosGroup/Vulkan-Samples,KhronosGroup/Vulkan-Samples,KhronosGroup/Vulkan-Samples,KhronosGroup/Vulkan-Samples,KhronosGroup/Vulkan-Samples