byzantium: Add directx-headers and libdrm
Both are dependencies of mesa 21.1.
directx-headers does not exist in byzantium yet, while libdrm is 2.4.104 - but mesa requires 2.4.105.
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Both are dependencies of mesa 21.1.
directx-headers does not exist in byzantium yet, while libdrm is 2.4.104 - but mesa requires 2.4.105.