Update for latest D3DX12 #320

Job	Run time
build (x64-Release-UWP-Clang, amd64)	2m 17s
build (x64-Debug-UWP-Clang, amd64)	1m 37s
build (x64-Debug-UWP, amd64)	1m 27s
build (x86-Release-UWP, amd64_x86)	1m 34s
build (x64-Release-UWP, amd64)	1m 31s
build (x86-Debug-UWP, amd64_x86)	2m 17s
build (x86-Release-UWP-Clang, amd64_x86)	1m 45s
build (x86-Debug-UWP-Clang, amd64_x86)	3m 33s
build (arm64-Release-UWP-Clang, amd64_arm64)	2m 38s
build (arm64-Release-UWP, amd64_arm64)	2m 18s
build (arm64-Debug-UWP, amd64_arm64)	1m 31s
build (arm64-Debug-UWP-Clang, amd64_arm64)	1m 29s
	23m 57s

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