MacOS tests have been spamming a lot of lines of this warning from
SwiftShader, sometimes hiding the actual cause of an issue:

../../third_party/swiftshader/src/Vulkan/VkDeviceMemory.cpp:235 WARNING: VkMemoryAllocateInfo->pNext sType = 1000178000

This CL properly silences this warning.

Bug: chromium:1185611
Change-Id: Ic9c84c0d57dc142904626bbb3c8a0af5c3cff40d
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/54008
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Commit-Queue: Alexis Hétu <sugoi@google.com>